CN1735224A - Method and device for limiting P2P communication interfere - Google Patents

Abstract

The method to limit disturbance to P2P communication comprises steps executed by communication network: setting P2P communication parameter according to the network state used to limit the disturbance from one user that is communicating to others and transmitting to user terminal. The steps executed by terminal comprises: receiving the P2P parameter, executing P2P detection process with another terminal by the parameter to obtain a proper emission power, and P2P communication with another user according to the parameter and emission power.

Description

The method and apparatus that is used for the limiting P 2 P Communication Jamming

Invention field

The present invention relates to a kind of point-to-point equity (P2P) communication, relate in particular to a kind of method and apparatus that is used for the limiting P 2 P Communication Jamming.

Technical background

In traditional cell mobile communication systems, user terminal must communicate by the relaying ability and the another one user terminal of base station.Fig. 1 has shown the conventional communication mode in the TD-SCDMA system, universal mobile telecommunications system grounding wireless access network (UTRAN) interactive information that user terminal UE1 and UE2 constitute by base station (Node B) and radio network controller (RNC).Yet, when residing in two user terminal close proximity of same sub-district, adopt the mode of direct communication, should be a kind of more reasonable method, this method is exactly so-called point-to-point peer-to-peer communications, is called for short P2P.P2P communication typically is applied in the uplink and downlink link and all adopts in the TDD wireless system of same carrier, below is example with the TD-SCDMA system just, introduces two kinds of P2P communication patterns.

Fig. 2 has shown a kind of P2P communication pattern.As shown in Figure 2, can directly set up " P2P direct link " (shown in the solid line) that is used for the business transferring data between UE1 and the UE2.UTRAN is then by the communication conditions on the monitoring of the control link (shown in dotted line) between itself and the UE direct link.This P2P communication pattern by base station monitoring is called " online P2P communication ".Online P2P communication pattern has been owing to save the relaying of base station, thereby saved almost 50% Radio Resource, still can keep UTRAN to the P2P control of communication simultaneously.The application people who submits on March 7th, 2003 be that Koninklijke Philips Electronics N.V, application number are respectively the specific implementation method that has disclosed online P2P communication pattern in 03119892.9 and 03119894.5 the patent application, introduces the content that this patent application is disclosed in the mode of insertion here.

Based on above-mentioned online P2P communication pattern, further can set up a kind ofly under the situation that does not have the base station to support, the communication pattern by user terminal self-organizing ground carries out P2P communication is called off-line P2P communication pattern.Fig. 3 illustrates the schematic diagram of off-line P2P communication pattern.As shown in the figure, before carrying out off-line P2P communication, UE1 and UE2 at first under conventional communication mode to UTRAN registers offline P2P communication service, and acquisition P2P communication discriminating code each other, submitting to simultaneously with the application, the application people is a Koninklijke Philips Electronics N.V, and application scheme number is introduced the content that this patent application is disclosed with inserted mode here for having disclosed the detailed process that UE obtains the P2P communication discriminating code in the patent application of CN040033; Then, two UE break away from monitoring and the support of UTRAN, independently set up P2P communication according to the P2P communication discriminating code each other that obtains in the registration process; At last, behind the P2P sign off, UE1 and UE2 turn back to the traditional communication idle pulley again.

This off-line P2P communication is communicated by letter with online P2P and is compared, and has not only saved the expense of signaling, even and UE be positioned at outside the zone that wireless network covers, as be positioned at zones such as ocean, high mountain or battlefield, still can set up the P2P communication linkage.In addition, when two UE distances that are positioned at the sub-district are very near, also can adopt this off-line P2P communication pattern.At this moment, owing to do not control link between UTRAN and the UE, therefore, as long as the transmitting power of UE1 and UE2 is low to the negligible degree of network system, the user just can enjoy than the cheap a lot of off-line P2P communication service of traditional communication.

As mentioned above, for conventional communication mode, UE always communicates by the relaying of UTRAN, thus UTRAN can be by the control signaling directly with the transmission power limit of UE within a reasonable range.But, for the P2P communication pattern, since the direct link and the shared same carrier frequency of the uplink and downlink link in the traditional communication of P2P communication, and might share same time slot by the multiplex mode of code division multiple access, thereby P2P communication might be disturbed the proper communication of other UE.

When UE is in online P2P communication pattern, though UTRAN can be by the transmitting power of control controlling links UE, but, in order to save signaling consumption, the signaling cycle that is used for power control is generally longer, so UTRAN often can not in time adjust the transmitting power of UE, to reduce the interference that P2P communication brings.

When two UE that are positioned at the sub-district adopt off-line P2P communication patterns, do not have the control link owing to be between two UE in the off-line P2P communication and the UTRAN, thereby UE is not subjected to the control of UTRAN fully.At this moment, if the transmitting power of UE is not limited, this off-line P2P communication pattern is more serious to the interference meeting that the UE that is in conventional communication mode in the sub-district causes.

In addition, when UE sets up off-line P2P communication outside the communication network coverage area territory, though the UE that is in this moment in the off-line P2P communication pattern no longer is a subject matter to the interference that the UE that is in the conventional communication mode produces, but, if the transmitting power to UE does not suitably limit, then too high transmitting power not only can cause unnecessary power consumption, but also might disturb ongoing other off-lines P2P communication in this zone.

Therefore, need to propose a kind of new method that is used for the limiting P 2 P Communication Jamming.

Summary of the invention

One object of the present invention is to propose a kind of method that is used for the limiting P 2 P Communication Jamming, adopts this method, and the interference-limited that can cause communicating by letter owing to P2P is in a zone of reasonableness, and is unaffected to guarantee other UE that are in the communication.

According to a kind of method of in a communications network system, carrying out that is used for the limiting P 2 P Communication Jamming of the present invention, comprise: according to the proterties of this communication network, the P2P messaging parameter is set, and this P2P messaging parameter can be used for limiting the interference that a user terminal produces other user terminals when carrying out P2P communication; This P2P messaging parameter is sent to this user terminal in this communication network, communicate by letter so that this user terminal can carry out P2P according to this P2P messaging parameter and another user terminal.

According to a kind of method of in a user terminal, carrying out that is used for the limiting P 2 P Communication Jamming of the present invention, comprise: receive the P2P messaging parameter that is sent by a communications network system, this P2P messaging parameter can be used for limiting the interference that this user terminal produces other user terminals when carrying out P2P communication; Utilize this P2P messaging parameter, carry out the P2P detection process with another user terminal, to obtain a suitable transmission power; Utilize this suitable transmission power,, carry out P2P with this another user terminal and communicate by letter according to this P2P messaging parameter.

According to a kind of communications network system of the present invention, comprise: one is provided with the unit, be used for the proterties according to this communication network, the P2P messaging parameter is set, this P2P messaging parameter can be used for limiting the interference that a user terminal produces other user terminals when carrying out P2P communication; A transmitting element is used for this P2P messaging parameter is sent to this user terminal of this communication network, communicates by letter so that this user terminal can carry out P2P according to this P2P messaging parameter and another user terminal.

According to a kind of user terminal of the present invention, comprise: a receiving element, be used to receive the P2P messaging parameter that is sent by a communications network system, this P2P messaging parameter can be used for limiting the interference that this user terminal produces other user terminals when carrying out P2P communication; A probe unit is used to utilize this P2P messaging parameter, carries out the P2P detection process with another user terminal, to obtain a suitable transmission power; An adjustment unit is used for adjusting this user terminal and surveys the transmitting power of communicating by letter with P2P at P2P; A judging unit is used to judge whether this adjusted transmitting power meets the restrictive condition of this P2P messaging parameter; A P2P communication unit uses the transmitting power that meets this P2P messaging parameter restrictive condition, carries out P2P with this another user terminal and communicates by letter.

By with reference to below in conjunction with the content in the description of the drawings and claims, and along with more complete understanding of the invention, other purposes of the present invention and effect will become clear more and easy to understand.

The accompanying drawing summary

Hereinafter with reference to accompanying drawing, describe the present invention by embodiment, wherein:

Fig. 1 is the schematic diagram that adopts the TD-SCDMA system of conventional communication mode;

Fig. 2 is the schematic diagram that adopts the TD-SCDMA system of online P2P communication pattern;

Fig. 3 is the schematic diagram that adopts the TD-SCDMA system of off-line P2P communication pattern;

Fig. 4 is according to one embodiment of the present of invention, by the flow chart that is used for the limiting P 2 P Communication Jamming of UTRAN execution; With

Fig. 5 is according to one embodiment of the present of invention, by the flow chart that is used for the limiting P 2 P Communication Jamming of the UE execution of carrying out off-line P2P communication;

Fig. 6 be according to one embodiment of the invention can the limiting P 2 P Communication Jamming user terminal and the composition schematic diagram of network system.

In institute's drawings attached, identical label is represented feature or function similar or response.

Detailed Description Of The Invention

The method that is used for the limiting P 2 P Communication Jamming according to the present invention's proposition, communications network system can be according to the proterties of communication network and the running status of current communication network, one group of P2P messaging parameter is set, and this P2P messaging parameter is broadcast to each user terminal UE in the sub-district via Broadcast Control Channel.After receiving this P2P messaging parameter, UE can select corresponding P2P messaging parameter according to its present position, for example: P2P probe power and P2P power of communications are controlled in the P2P link detection process and transmitting power in P2P communicates by letter, thereby reduce the interference that P2P communication brings effectively.

Below, will be in conjunction with the accompanying drawings, be example with the TD-SCDMA system, the method that is used for the limiting P 2 P Communication Jamming that the present invention proposes is described.

Accompanying drawing 4 is according to one embodiment of the present of invention, the process that is used for the limiting P 2 P Communication Jamming carried out in UTRAN.

As shown in Figure 4, at first: UTRAN is provided with one group of P2P messaging parameter (step S110).The setting of this P2P messaging parameter relates generally to the content of P2P messaging parameter and two aspects of numerical value of each P2P messaging parameter.

1, about the content of P2P messaging parameter

The content of P2P messaging parameter can be in the position of communication network and the P2P communication pattern that may adopt correspondingly is provided with according to UE.

For example: when UE was positioned at the sub-district of communication network covering, UE can adopt online P2P communication pattern can also adopt off-line P2P communication pattern.Thereby consider do not control link UTRAN between UE in being in the offline communications pattern and the UTRAN can not be by the transmitting power of control signaling control UE, therefore, preferably the transmitting power of UE is set to maximum online P2P power of communications and two P2P messaging parameters of maximum offline P2P power of communications.If UE employing off-line P2P communication pattern, then UE should select corresponding strict more P2P messaging parameter, with the P2P signal of avoiding the UE emission other UE that are in the sub-district in the communication is produced interference.Usually the maximum offline P2P power of communications numerical value that is allowed is lower than maximum online P2P power of communications numerical value.

Again for example: in the time of outside UE is positioned at the communication network covering, since this UE this moment communicate by letter with off-line P2P that another UE carries out in the sub-district to be in the P2P Communication Jamming that other UE in the communication produce no longer be subject matter, so the maximum offline P2P power of communications numerical value of use when at this moment the maximum offline P2P power of communications numerical value that uses of this UE can be higher than this UE and is in the sub-district.Therefore, above-mentioned maximum offline P2P power of communications can further be divided into maximum offline P2P power of communications within the communication network coverage and the maximum offline P2P power of communications outside the communication network coverage, thereby can select more wide in range P2P messaging parameter relatively when making outside UE is in the communication network covering, with the wireless range of expansion P2P communication.

For the transmitting power of in the P2P link detection, using, also can be with reference to aforesaid way, be in the position of communication network and the P2P communication pattern that may adopt is provided with according to UE.

In addition, the P2P messaging parameter can also comprise the common radio resources (as: the off-line P2P communication discriminating code of off-line P2P communication frequency and acquiescence) that whether allows user terminal to enjoy the indication information of P2P communication service and be used for off-line P2P communication.

2, about the numerical value of P2P messaging parameter

The numerical value of P2P messaging parameter can correspondingly be provided with according to the running status of the proterties of communication network and current communication network (step S110).

Wherein, the proterties of communication network relates to but is not limited to: the network characteristic of being made up of the sub-district of a certain coverage (that is: sub-district area) that communication network embodied, the network characteristic of being born by communication network that business load embodied.The operator of communication network can formulate and adjust the resource management scheme of network according to the proterties of communication network.

For example: the proterties of the communication network of being made up of the sub-district of different coverages (that is: radius of society difference) is different, can be embodied in: be in the user terminal of P2P communication pattern, be different the degree of the P2P Communication Jamming of other user terminals of communicating by letter of being arranged in communication network, generation, therefore, can the P2P messaging parameter of respective value be set at the sub-district of different coverages.

Again for example: build the sub-district and the sub-district of building meagrely-populated suburb in of bustling commercial block in, the proterties of communication network obviously is different.Because in the sub-district of the commercial block of prosperity, communication service is generally more, therefore, Virtual network operator can be set in resource management scheme and ban use of P2P communication in this sub-district, and the numerical value of corresponding P2P messaging parameter is set, to avoid being in the interference that user in the traditional communication is subjected to P2P communication; Strict relatively P2P messaging parameter also can be set in resource management scheme, thereby only allow small number of users to use P2P communication, and with in the corresponding P2P messaging parameter for example the numerical value of P2P transmitting power be provided with lower, be in the P2P Communication Jamming that the user in the traditional communication is subjected to reduce as far as possible.And for the sub-district of building meagrely-populated suburb in, the numerical value of corresponding P2P messaging parameter can be provided with more wide in rangely, can also several groups of P2P messaging parameters be set according to factors such as communication distance and communication environments, to extend the wireless range of P2P communication.

In addition, UTRAN can also be according to the running status of detected current communication network, for example: communication network is current to be in busy state or idle condition and different professional periods, the correspondingly numerical value of P2P messaging parameter is set, with in the wireless range of extending P2P communication, reduce the influence of P2P communication to other UE that communicating by letter.

After according to the proterties of communication network and running status corresponding P2P messaging parameter being set, UTRAN can periodically be broadcast to this P2P messaging parameter each UE (step S120) that is arranged in the sub-district via Broadcast Control Channel (BCCH).

For the resource management scheme that can adapt to communication network and the variation of running status, thereby revise corresponding P2P messaging parameter in time, UTRAN checks periodically or in real time also whether the resource management scheme of communication network and running status variation (step S130) has taken place after having sent the P2P messaging parameter.According to this testing result, UTRAN judges whether to reset P2P messaging parameter (step S140).And, when detecting this resource management scheme and running status and change, reset corresponding P2P messaging parameter (step S150).

Accompanying drawing 5 is according to one embodiment of the present of invention, a UE who is within the communication network coverage, adopt off-line P2P communication pattern, behind the P2P messaging parameter that reads above-mentioned UTRAN transmission via Broadcast Control Channel, select corresponding P2P messaging parameter and according to the P2P messaging parameter of selecting according to its current present position, set up and keep the process that off-line P2P communicates by letter.

Suppose that this UE has registered off-line P2P communication service to UTRAN, and obtaining communication the other side's P2P communication discriminating code.The P2P communication service of this registers offline is also obtained the method for P2P communication discriminating code, submitting to simultaneously with the application, the application people be that Koninklijke Philips Electronics N.V, applicant's file number are to have a detailed description in the patent application of CN040033 and CN040032, introduces the content that this patent application is disclosed in this mode with insertion.

As shown in Figure 5, at first, UE reads the P2P system parameters (step S210) in the Broadcast Control Channel.According to the P2P communication pattern (online P2P communicate by letter or off-line P2P communicates by letter) that the current present position of UE (be positioned within the communication network or outside) and desire adopt, this UE selects corresponding P2P messaging parameter (step S220) from the P2P messaging parameter of being received.

Suppose that this UE is arranged in the sub-district, this UE desire adopts off-line P2P communication pattern, and comprise maximum offline P2P probe power and maximum offline P2P power of communications within the network coverage in the resulting P2P messaging parameter of this UE at least, then this maximum offline of this UE P2P probe power is set to be used for the Initial Trans (step S230) that off-line P2P communication link is surveyed, and begins to carry out the link detection (step S240) of off-line P2P communication.

In the link detection process, this UE and communication counterpart consult to adjust this transmitting power (step S250), and judge that this consults adjusted transmitting power and whether be higher than this maximum offline P2P probe power, to obtain a suitable transmitting power (step S260) that is used for P2P communication.

If this is consulted adjusted transmitting power and is higher than this maximum offline P2P probe power, then show the link detection failure of this off-line P2P communication, this UE can also can switch to conventional communication mode (step S280) by reselecting the link detection that corresponding P2P messaging parameter switches to online P2P communication.

If this is consulted adjusted transmitting power and is not higher than this maximum offline P2P probe power, then indicate the link detection success of this off-line P2P communication, this UE uses this to consult adjusted transmitting power, begins to carry out off-line P2P communication (step S270).

In off-line P2P communication process, this UE constantly adjusts transmitting power (step S290) according to the variable in distance between it and the communication counterpart and the variation of communication environment.When adjusting transmitting power, this UE will judge whether adjusted transmitting power is higher than this maximum offline P2P power of communications (step S300) at every turn.

If adjusted transmitting power is higher than this maximum offline P2P power of communications, then stop this off-line P2P communication, this UE switches to the link detection of online P2P communication, or switches to conventional communication mode (step S310).

If adjusted transmitting power is not higher than this maximum offline P2P power of communications, then this UE uses this adjusted transmitting power to proceed off-line P2P communication (step S320).

Set up and keep the process that this off-line P2P communicates by letter at this UE, this UE periodically reads the P2P messaging parameter (step S330) that sends via Broadcast Control Channel, and the P2P messaging parameter of judging this reception whether with the P2P messaging parameter identical (step S340) of current use.

If conversion has taken place the P2P messaging parameter of this reception,, upgrade original corresponding P2P messaging parameter (step S350) then according to the P2P messaging parameter of this reception.And in the off-line P2P communication of proceeding, this UE utilizes the P2P messaging parameter after this renewal, adjusts transmitting power (step S360).

Behind off-line P2P sign off (step S370), this UE turns back to the idle pulley (step S380) of traditional communication.

Below in conjunction with the accompanying drawings 5, described the UE that is within the network coverage and set up according to the P2P messaging parameter and keep the process that off-line P2P communicates by letter.If above-mentioned this UE that is arranged in the sub-district, select to adopt online P2P communication pattern, and comprise maximum online P2P probe power and maximum online P2P power of communications in the resulting P2P messaging parameter of this UE, then this UE can according to the similar process of above-mentioned steps, according to this P2P messaging parameter, enter in the online P2P communication via an online P2P communication link detection process.Different with off-line P2P communication pattern is, owing to keeping the control link between UE and UTRAN, is in this UE in the online P2P communication pattern, can be by adjusting the numerical value of its P2P messaging parameter with the negotiation of UTRAN.For example: if the current idle condition that is in of communication network, then through consulting, this UE might obtain than the higher transmitting power of the online P2P power of communications of above-mentioned maximum, and utilize this transmitting power to carry out online P2P communication, thereby under the prerequisite that does not influence other telex networks, can further extend the wireless range of P2P communication.

If after having registered off-line P2P communication service, this UE desires to carry out off-line P2P communication in the zone beyond the communication network coverage, then this UE can be according to setting up and keep step like the off-line P2P communication class with the above-mentioned user terminal that is arranged in the sub-district, the P2P messaging parameter that obtains from communications network system by Broadcast Control Channel in network coverage the time according to this UE or this UE are stored in P2P messaging parameter the Subscriber Identity Module (SIM card) for example (supposing that this P2P messaging parameter comprises outside the network coverage a group or several groups of maximum offline P2P probe power and maximum offline P2P power of communications) in advance, enter in the off-line P2P communication via off-line P2P communication link detection process.

The above-mentioned method that is used for the limiting P 2 P Communication Jamming of the present invention can adopt software to realize, also can adopt hardware to realize, or adopts way of hardware and software combination to realize.

According to one embodiment of the present of invention, the network system that this can the limiting P 2 P Communication Jamming and the composition of user terminal as shown in Figure 6, wherein identical with user terminal with legacy network system parts are not shown in Figure 6.

As shown in Figure 6, at first: among thenetwork system UTRAN 100unit 110 is set, according to the proterties of this communication network, for example: the resource management scheme of communication network and the coverage of communication network are provided with the P2P messaging parameter.This is provided withunit 110, and the running status of the current communication network that can also detect according to detectingunit 150 is provided with this P2P messaging parameter.

Then, transmittingelement 130 sends to UE1 in this communication network with this P2P messaging parameter, communicates by letter so that this UE1 carries out P2P according to this P2P messaging parameter and another user terminal.

Wherein, it is the same that this P2P messaging parameter and the above-mentioned method that is used for the limiting P 2 P Communication Jamming are described, and also relates to content and two aspects of numerical value of P2P messaging parameter.The content of this P2P messaging parameter, be in the position of communication network with UE and the P2P communication pattern that may adopt relevant, the numerical value of this P2P messaging parameter, relevant with the running status of the proterties of communication network and current communication network.And this P2P messaging parameter should comprise maximum offline P2P probe power and the maximum offline P2P power of communications that is used within the communication network coverage at least.

Receive the P2P messaging parameter of UTRAN transmission at receivingelement 10 after, the selectedcell 20 among the user terminal UE1 according to the P2P communication pattern of this UE present position and desire employing, is selected corresponding P2P messaging parameter from the P2P messaging parameter that is received.Afterwards, theprobe unit 42 in P2P link detection/communication unit 40, according to the P2P messaging parameter of this selection, the maximum offline P2P probe power that comprises in this P2P messaging parameter is set to Initial Trans, surveys to carry out off-line P2P.In this off-line P2P detection process, theadjustment unit 34 in the judgement/adjustment unit 30 consults to adjust this transmitting power with communication counterpart; Judgingunit 32 judges that this consults adjusted transmitting power and whether be higher than this maximum offline P2P probe power.If this is consulted adjusted transmitting power and is not higher than this maximum offline P2P probe power, theP2P communication unit 44 in P2P link detection/communication unit 40 then utilizes this to consult adjusted transmitting power and carries out off-line P2P with communication counterpart and communicate by letter.

In off-line P2P communication process, UE1 is according to the variable in distance between it and the communication counterpart and the variation of communication environment, constantly adjust transmitting power byadjustment unit 34, and judge whether this adjusted transmitting power is higher than described maximum offline P2P power of communications; If this adjusted transmitting power is not higher than maximum offline P2P power of communications, then theP2P communication unit 44, use this adjusted transmitting power to proceed off-line P2P communication.

When a user terminal adopts online P2P communication pattern, this user terminal can adopt and the similar method and apparatus of above-mentioned off-line P2P communication pattern, according to P2P messaging parameter, carry out the link detection process with the transmitting power of determining online P2P communication and the numerical value of in the P2P communication process, controlling transmitting power at online P2P communication pattern.

Beneficial effect

By above in conjunction with the accompanying drawings to the detailed description of the embodiment of the invention, be not difficult to find out: because at the method and apparatus that is used for the limiting P 2 P Communication Jamming proposed by the invention, UTRAN can be according to the proterties of communication network and the running status of current communication network, be provided with and renewal P2P messaging parameter, the feasible UE that is arranged in communication network, when being in the P2P communication pattern, especially when being in off-line P2P communication pattern, can be according to this P2P messaging parameter, adjust its for example numerical value of transmitting power, with the wireless range of limiting P 2 P communication, thereby reduce this P2P communication effectively to other are in the interference of the user in the communication in the communication network.

In addition, be in the off-line P2P communication of setting up outside the communication network for UE, communication limits to off-line P2P to utilize this P2P messaging parameter, not only can be so that UE reduce unnecessary power consumption, but also can reduce other also are in the P2P Communication Jamming that the user caused in the off-line P2P communication.

The method and apparatus that is used for the limiting P 2 P Communication Jamming that the present invention proposes though be that example is described with the TD-SCDMA system, it will be apparent to one skilled in the art that this method and apparatus can also be applied in other P2P wireless communication systems.

It will be appreciated by those skilled in the art that and on the basis that does not break away from content of the present invention, to make various improvement the disclosed method and apparatus that is used for the limiting P 2 P Communication Jamming of the invention described above.Therefore, protection scope of the present invention should be determined by the content of appending claims.

Claims (24)

1, a kind of method of carrying out in a communications network system that is used to limit point-to-point equity (P2P) Communication Jamming comprises:

(a) according to the proterties of this communication network, the P2P messaging parameter is set, this P2P messaging parameter can be used for limiting the interference that a user terminal produces other user terminals when carrying out P2P communication;

(b) this P2P messaging parameter is sent to this user terminal in this communication network, communicate by letter so that this user terminal can carry out P2P according to this P2P messaging parameter and another user terminal.

2, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 1, the proterties of wherein said communication network comprise at least the resource management scheme of described communication network and described communication network coverage the two one of.

3, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 1 or 2, wherein step (a) also comprises:

Detect the running status of described communication network;

According to the running status of described communication network, described P2P messaging parameter is set.

4, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 3, wherein said P2P messaging parameter comprise maximum offline P2P probe power and the maximum offline P2P power of communications within the described communication network coverage at least.

5, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 4, wherein, in described step (b), described P2P messaging parameter sends to described user terminal via Broadcast Control Channel (BCCH).

6, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 2 also comprises step:

Whether the resource management scheme of checking described communication network changes;

If variation has taken place, then reset corresponding P2P messaging parameter.

7, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 3 also comprises step:

Whether the running status that detects described communication network changes;

If variation has taken place, then reset corresponding P2P messaging parameter.

8, a kind of method of carrying out in a user terminal that is used for the limiting P 2 P Communication Jamming comprises:

(a) receive the P2P messaging parameter that is sent by a communications network system, this P2P messaging parameter can be used for limiting the interference that this user terminal produces other user terminals when carrying out P2P communication;

(b) utilize this P2P messaging parameter, carry out the P2P detection process with another user terminal, to obtain a suitable transmission power;

(c) utilize this suitable transmission power,, carry out P2P with this another user terminal and communicate by letter according to this P2P messaging parameter.

9, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 8, wherein step (b) comprising:

According to the position of described user terminal and the P2P communication pattern of desire employing, from the P2P messaging parameter that is received, select corresponding P2P messaging parameter;

Utilize the P2P messaging parameter of this selection, carry out the P2P detection process with another user terminal.

10, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 9, wherein said P2P messaging parameter comprise maximum offline P2P probe power and the maximum offline P2P power of communications within the described communication network coverage at least.

11, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 10, wherein, described step (b) comprising:

Utilize described maximum offline P2P probe power, carry out off-line P2P detection process;

In this off-line P2P detection process, consult to adjust this transmitting power with described another user terminal;

Judge that this consults adjusted transmitting power and whether be higher than described maximum offline P2P probe power;

If this is consulted adjusted transmitting power and is not higher than described maximum offline P2P probe power, then utilize this to consult adjusted transmitting power and carry out off-line P2P with described another user terminal and communicate by letter.

12, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 11 also comprises step:

If this is consulted adjusted transmitting power and is higher than described maximum offline P2P probe power, then switch to online P2P communication detecting process and conventional communication mode the two one of.

13, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 11 also comprises step:

In off-line P2P communication process, adjust the transmitting power that sends the P2P signal;

Judge whether this adjusted transmitting power is higher than described maximum offline P2P power of communications;

If this adjusted transmitting power is not higher than described maximum offline P2P power of communications, then uses this adjusted transmitting power to carry out off-line P2P and communicate by letter with described another user terminal.

14, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 13 also comprises step:

If this adjusted transmitting power is higher than described maximum offline P2P power of communications, then switch to online P2P communication detecting process and conventional communication mode the two one of.

15, the method that is used for the limiting P 2 P Communication Jamming as claimed in claim 8 also comprises step:

Judge whether the P2P messaging parameter that receives is identical with the P2P messaging parameter of current use;

If variation has taken place this P2P messaging parameter that receives, then upgrade corresponding P2P messaging parameter.

16, a kind of communications network system comprises:

One is provided with the unit, is used for the proterties according to this communication network, and the P2P messaging parameter is set, and this P2P messaging parameter can be used for limiting the interference that a user terminal produces other user terminals when carrying out P2P communication;

A transmitting element is used for this P2P messaging parameter is sent to this user terminal of this communication network, communicates by letter so that this user terminal can carry out P2P according to this P2P messaging parameter and another user terminal.

17, communications network system as claimed in claim 16, the proterties of wherein said communication network comprise at least the resource management scheme of described communication network and described communication network coverage the two one of.

18, as claim 16 or 17 described communications network systems, also comprise:

A detecting unit is used to detect the running status of described communication network;

Wherein, the described unit that is provided with according to the running status of described communication network, is provided with described P2P messaging parameter.

19, a kind of user terminal comprises:

A receiving element is used to receive the P2P messaging parameter that is sent by a communications network system, and this P2P messaging parameter can be used for limiting the interference that this user terminal produces other user terminals when carrying out P2P communication;

A probe unit is used to utilize this P2P messaging parameter, carries out the P2P detection process with another user terminal, to obtain a suitable transmission power;

A judging unit is used to judge whether this suitable transmission power meets the restrictive condition of this P2P messaging parameter;

A P2P communication unit uses this suitable transmitting power that meets this P2P messaging parameter restrictive condition, carries out P2P with this another user terminal and communicates by letter.

20, user terminal as claimed in claim 19 also comprises:

An adjustment unit is used for adjusting this user terminal and surveys the transmitting power of communicating by letter with P2P at P2P.

21, user terminal as claimed in claim 20 also comprises:

A selected cell is used for selecting corresponding P2P messaging parameter according to the position of this user terminal and the P2P communication pattern of desire employing from this P2P messaging parameter.

22, user terminal as claimed in claim 21, the P2P messaging parameter of wherein said selection comprise maximum offline P2P probe power and the maximum offline P2P power of communications within the described communication network coverage at least.

23, user terminal as claimed in claim 22, wherein:

Described probe unit, described maximum offline P2P probe power is set to Initial Trans, surveys to carry out off-line P2P;

Described adjustment unit in this off-line P2P detection process, consults to adjust this transmitting power with described another user terminal;

Described judging unit judges that this consults adjusted transmitting power and whether be higher than described maximum offline P2P probe power;

If described judging unit is determined to survey successfully, then described P2P communication unit utilizes this to consult adjusted transmitting power and carries out off-line P2P with described another user terminal and communicate by letter.

24, user terminal as claimed in claim 23, wherein:

Described adjustment unit in off-line P2P communication process, is adjusted the transmitting power that sends the P2P signal;

Described judging unit judges whether this adjusted transmitting power is higher than described maximum offline P2P power of communications;

If described judging unit determines that adjusted transmitting power is not higher than described maximum offline P2P power of communications, then described P2P communication unit uses this adjusted transmitting power to carry out off-line P2P with described another user terminal and communicates by letter.

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