CN102625439B - Method and equipment for carrying out synchronization - Google Patents
Method and equipment for carrying out synchronization Download PDFInfo
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- CN102625439B CN102625439B CN201110033745.4A CN201110033745A CN102625439B CN 102625439 B CN102625439 B CN 102625439B CN 201110033745 A CN201110033745 A CN 201110033745A CN 102625439 B CN102625439 B CN 102625439B
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Abstract
The embodiment of the invention relates to the wireless communication technology field, especially to a method and equipment for carrying out synchronization, so that access point (AP) equipment can carry out synchronization. According to the embodiment of the invention, the method comprises that: when first AP equipment determines that it is unnecessary to use the first AP equipment itself as a synchronous source, parameter information of each adjacent second AP equipment is determined; according to the parameter information, the first AP equipment determines one second AP equipment as a synchronous source from the second AP equipment; and the first AP equipment carries out synchronization with the synchronous source. Because the AP equipment can carry out synchronization, thereby improving the performance of the AP equipment and providing assurance for operation of a system newly introduced.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind ofly carry out synchronous method and apparatus.
Background technology
In recent years, universal along with mobile Internet (Mobile Internet) and smart mobile phone, Mobile data traffic demand rapidly increases, and house data business occupies a large portion ratio.Indoor and hot spot data service feature are generally fixing for user or very low speed moves, less demanding to mobility; On the other hand, data service is mainly the Internet business based on IP (Internet Protocol, Internet Protocol), to QoS (Quality of Service, service quality) requirement more single, and well below the requirement of carrier class business to QoS.Traditional cell mobile communication systems mainly towards be high-speed mobile, the carrier class service design of seamless switching, when its carrying large discharge low speed IP data packet traffic time, efficiency is on the low side, high cost.
To sum up, honeycomb mobile operator needs to find out low cost, high power capacity, is applicable to the solution of indoor wireless data access.Solution main is at present:
Home eNodeB (Femto, femtocell base station) as another solution solving indoor and hot zones data service flow demand, shorter according to covering indoor distances, the feature that number of users is less, reduce capacity requirement and the merit emissivity at single station, usual number of users is at 8-20, and power is suitable with mobile phone terminal, generally at below 23dBm.Figure 1A is LTE (Long Term Evolution, Long Term Evolution) Femto network architecture schematic diagram, and the framework of employing Femto scheme can see shown in Figure 1A.
Home eNodeB is relative to indoor covering system and micro-base station, and cost is lower, disposes more flexible, serves the effect of business experience of certain house data.But its deficiency with: Home eNodeB is not optimized for house data business characteristic, for LTE system, LTE Femto system have employed the complete protocol infrastructure of LTE system and Interface design substantially, so realize complicated, just Base Station Compatibility and power reduction, so cost remains high always.In addition, Femto is IMT (International MobileTelecommunications, international mobile telecommunication) equipment in system, its frequency that can work is still for frequency range is authorized by the operator in IMT, relative WiFi can bandwidth less, carrier data service distributing demand cannot be met completely.
At present, Home eNodeB mainly contains following three kinds of simultaneous techniquess:
1, GPS (Global Positioning Systems, global positioning system).
If HeNB has installed GPS, can obtain gps satellite synchronizing signal, GPS just can provide sync identification (100ns) accurately for it, but the use of GPS is limited to environment, especially almost cannot work in indoor environment, and cost is higher.
2, IEEE (IEEE Institute of Electrical and Electronics Engineers Institute of Electrical and Electronics Engineers) 1588v2.
Under good back haul link network support (can be the fiber optic Ethernet that operator lays), 1588v2 also can provide the synchronization accuracy of Microsecond grade, but all can there is high-quality back haul link support under not all scene, and cable and XDSL (X digital subscriber line, x Digital Subscriber Line road) also all there is the problem of time delay instability, considerable influence can be produced to synchronization accuracy.
3, network monitoring.
Work under the condition that network monitoring scheme cannot be able to use in GPS and 1588v2 scheme, therefore for TD-LTE HeNB, this is a kind of requisite synchronization mechanism.Network monitoring scheme refers to HeNB and demodulate timing information from the synchronizing signal of adjacent macrocell or other HeNB cell.Use the HeNB cell of network monitoring mechanism can use synchronizing signal or the reference signal of other eNB (synchronous eNB) community.Under most scene, the covering of macrocell is fairly perfect, is all this single hop synchronization situation.But when HeNB cell can't detect eNB cell signal time, just need the mode adopting multi-hop, synchronous other non-GNSS (Global Navigation Satellite System, GLONASS (Global Navigation Satellite System)) signal (HeNB cell), as shown in Figure 1B, HeNB2 can't detect the signal of synchronous eNB, but the signal of HeNB1 can be detected, so just can carry out indirect synchronization by monitoring the signal of HeNB1, the signal that wherein HeNB1 monitors synchronous eNB community carries out synchronously.
For the scene that multi-hop is synchronous, need the concept introducing the number of plies.The synchronous number of plies of a HeNB refers to the minimum hop count between this HeNB and GPS synchronisation source.The number of plies that the synchronous number of plies of a HeNB equals its synchronisation source adds one, and such as, in Figure 1B, the synchronous number of plies of the number of plies of synchronous eNB to be the synchronous number of plies of 0, HeNB1 be 1, HeNB2 is 2.
The cost of existing LTE Femto is relatively high, with wifi (Wireless Fidelity, adopting wireless fidelity technology) compare a certain distance, therefore a kind of new network access system is introduced, and add AP (Access Point in this system, access point) equipment, but also do not have AP equipment to carry out synchronous scheme at present.
Summary of the invention
What the embodiment of the present invention provided a kind ofly carries out synchronous method and apparatus, carries out synchronously in order to make AP equipment.
What the embodiment of the present invention provided a kind ofly carries out synchronous method, comprising:
One AP equipment, when determining that self does not need as synchronisation source, determines the parameter information of each the 2nd adjacent AP equipment;
According to described parameter information, a described AP equipment determines that from the 2nd AP equipment a 2nd AP equipment is as synchronisation source;
A described AP equipment carries out synchronous with synchronisation source.
What the embodiment of the present invention provided a kind ofly carries out synchronous AP equipment, comprising:
Processing module, for when determining that self does not need as synchronisation source, determines the parameter information of each the 2nd adjacent AP equipment;
Synchronisation source determination module, for determining from the 2nd AP equipment that according to described parameter information a 2nd AP equipment is as synchronisation source;
Synchronization module, for carrying out synchronous with synchronisation source.
Because AP equipment can carry out synchronously, thus improve the performance of AP equipment, run for the system (i.e. LTE-LAN (Local Area Network, local area network (LAN)) system) newly introduced and provide safeguard.
Accompanying drawing explanation
Figure 1A is the configuration diagram of Femto scheme;
Figure 1B is the synchronous schematic diagram of Home eNodeB;
Fig. 2 is the structural representation of AP equipment access in LTE-LAN system;
Fig. 3 is that the embodiment of the present invention carries out synchronous method flow schematic diagram;
Fig. 4 is that embodiment of the present invention AP device power-up carries out synchronous method flow schematic diagram;
Fig. 5 is the schematic diagram of the first AP equipment choice synchronisation source of the embodiment of the present invention;
Fig. 6 is the schematic diagram of embodiment of the present invention the second AP equipment choice synchronisation source;
Fig. 7 is the schematic diagram of the third AP equipment choice synchronisation source of the embodiment of the present invention;
Fig. 8 is the structural representation of embodiment of the present invention AP equipment;
Fig. 9 Long Term Evolution local area network (LAN) provided by the invention LTE-LAN system construction drawing.
Embodiment
The embodiment of the present invention the one AP equipment, when determining that self does not need as synchronisation source, according to the parameter information of the 2nd each adjacent AP equipment determined, determines that from the 2nd AP equipment a 2nd AP equipment is as synchronisation source, carries out synchronous with synchronisation source.Because AP equipment can carry out synchronously, thus improve the performance of AP equipment, run for the system (i.e. LTE-LAN system) newly introduced and provide safeguard.
In order to the effective covering to family enterprise's environment, hot spot region can be realized, and the approach providing big data quantity to communicate for the terminal with nomadic mobility, the present invention proposes a kind of system building Local wireless network based on LTE wireless access technology, as shown in Figure 9, Long Term Evolution local area network (LAN) LTE-LAN system provided by the invention, it is characterized in that, comprising:
Access device LTE-LAN-AP, for realizing the communication of terminal in the networking of Local wireless network Long Term Evolution local area network (LAN) LTE-LAN and LTE-LAN, and by setting up the data cube computation with external network, for terminal provides the approach of access external network;
Terminal, for by selecting and accessing a LTE-LAN-AP, becomes the network members of LTE-LAN, passes through accessed LTE-LAN-AP, communicate with other network members in LTE-LAN, and accesses the external network that LTE-LAN-AP connects.
LTE-LAN system architecture provided by the invention, terminal directly accesses external network by LTE-LAN-AP, and terminal room communication in LTE-LAN can be carried out by LTE-LAN-AP, communication between terminal and LTE-LAN-AP realizes based on LTE mobile communication system bottom communication technology, LTE-LAN-AP is based on LTE mobile communication system bottom communication technology constructing local network, therefore UE is based on LTE-LAN and external network communication, like this in family, enterprise or hot zones dispose the method for LTE-LAN-AP establishment WLAN (wireless local area network) effectively for terminal establishes local connecting system, thus allow terminal to realize information interaction and the access of realization to external network in comparatively direct mode in consolidated network inside, in addition, owing to realizing the system architecture of local network LTE-LAN based on LTE mobile communication system bottom communication technology, the wireless link of fail safe and QoS guarantee can be had by utilizing existing LTE system layer 1, layer 2 and layer 3 technology to set up between terminal and wireless network access point, efficient data communication services can be provided to terminal that is indoor and hot spot region.
Preferably, as shown in Figure 9, in the embodiment of the present invention, LTE-LAN system also comprises: operation and maintenance OAM entity, is connected with LTE-LAN-AP, mutual for by with LTE-LAN-AP, realizes configuring the network parameter of LTE-LAN, the management of terminal and the setting of LTE-LAN security mechanism.Keeper realizes being configured and management and maintenance LTE-LAN by OAM entity.
WAP (wireless access point) LTE-LAN-AP in the LTE-LAN system that the embodiment of the present invention provides utilizes existing LTE bottom to transmit and access technology provides wireless data link for terminal, thus provides the communication service having QoS and ensure for terminal.The LTE-LAN-AP of Local wireless network directly can access external network by the corresponding interface, and a kind of like this network configuration of flattening contributes to fast processing and the forwarding of terminal data, reduces the cost of network service, improves efficiency.LTE-LAN-AP and terminal all realize its respective function based on LTE mobile communication system bottom communication technology, namely by increasing interconnecting of terminal in the networking of new management and transmitting and scheduling functional realiey Local wireless network and local network, by transforming the network architecture of existing LTE system and upper-layer protocol when accessing without realizing terminal when Operator Core Network process the IP of external network.
According in the preferred embodiment of the present invention, the function that LTE-LAN-AP and terminal all realize based on LTE mobile communication system bottom communication technology is not limited thereto, can also corresponding functions expanding be carried out, below the function that LTE-LAN-AP in the preferred embodiment of the present invention and terminal realize based on LTE bottom communication technology is described:
1) LTE-LAN-AP function
On the whole, LTE-LAN-AP is the centralized control unit of LTE-LAN network, is responsible for networking and the management of LTE-LAN, for terminal LTE-LAN-UE provides Local wireless network access service.
In terminal side, LTE-LAN-AP sets up wireless connections based on existing LTE-Uu interface and terminal, owing to being LTE-Uu interface, therefore terminal communicates with LTE-LAN-AP working frequency range, wireless access technology all can overcome the defect existing for existing WLAN, for high level data transmission provides reliable transmission channel.LTE-LAN-AP utilizes the transmission channel with terminal room, can realize lower surface function: the control information that LTE-LAN-AP and terminal carry out top management inter-entity is mutual, realizes the management to terminal in LTE-LAN; Except control information, utilize this transmission channel, LTE-LAN-AP realization is to the transmission of the business datum of terminaloriented and reception.
In external network side, LTE-LAN-AP, by connecting the interface II of LTE-LAN-AP and external network, sets up the data cube computation to external network, for terminal access external network provides approach.
In addition, LTE-LAN-AP by connecting the interface I of LTE-LAN-AP and OAM entity, can also be connected with OAM entity, realizes the information interaction with OAM inter-entity.
2) terminal LTE-LAN-UE function
LTE-LAN-UE is the terminal with LTE-LAN access capability, namely can set up wireless connections based on LTE-Uu interface and LTE-LAN-AP.LTE-LAN-UE has following function: after start, by selecting and accessing the member that LTE-LAN-AP, a LTE-LAN-UE can become a LTE-LAN network; Pass through accessed LTE-LAN-AP, LTE-LAN-UE can communicate with other network memberses in LTE-LAN network, and accesses by the interface II of LTE-LAN-AP the external network that LTE-LAN-AP connects.
The LTE-LAN-UE terminal of above-mentioned functions is by supporting LTE bottom transmission technology and increasing suitable functional realiey in higher level protocol suite, it can be the existing LTE system terminal improved upper-layer protocol, also can be the LTE-LAN special-purpose terminal of bottom based on LTE system technology brand-new design.
3) OAM entity function
OAM entity is operation management maintain module, the network user can realize configuring the network parameter of LTE-LAN by it, the management of LTE-LAN terminal, the arranging of LTE-LAN security mechanism.OAM entity can close with LTE-LAN-AP and be located at Same Physical entity, or is divided into different physical entity from LTE-LAN-AP, and when setting up separately, OAM is connected by interface I and the LTE-LAN-AP connecting OAM and LTE-LAN-AP.
External network in Fig. 9 mainly refers to other networks outside Local wireless network LTE-LAN scope, as Internet network, home network, enterprise network etc.LTE-LAN-AP is connected with external network by the mode of back haul link (as xDSL, xPON, CABLE etc.) or Ethernet.
As shown in Figure 2, in LTE-LAN system, LTE-LAN-AP equipment (i.e. AP equipment) is a kind of new access device, existing LTE physical-layer techniques is have employed on eating dishes without rice or wine, direct access internet after synchronously completing between AP equipment, the frequency range of the frequency range of AP equipment use and macro base station (eNB) does not repeat (if repeat, then the current air interface synchronization technology of synchronization solutions reusable, namely all AP equipment all keeps synchronous with grand network).UE in LTE-LAN system completes the data service between internet by the passage set up between AP equipment.
Wherein, the embodiment of the present invention can be applied in LTE-LAN system, also can be applied in other and contain in the system of AP equipment.
As Fig. 3, the embodiment of the present invention is carried out synchronous method and is comprised the following steps:
Step 301, an AP equipment, when determining that self does not need as synchronisation source, determine the parameter information of each the 2nd adjacent AP equipment.
According to parameter information, step 302, an AP equipment determine that from the 2nd AP equipment a 2nd AP equipment is as synchronisation source.
Step 303, an AP equipment carry out synchronous with synchronisation source.
In step 303, the air interface synchronization mode that an AP equipment and synchronisation source carry out synchronous mode and current Femto Home eNodeB is identical, specifically see 3GPP Tdoc R2-092304 and 3GPP TdocR3-100392, can not repeat them here.
Wherein, an AP equipment can judge that self is the need of as synchronisation source the cycle.Preferably, an AP equipment be connected with synchronisation source disconnect and do not have other the 2nd AP equipment can as synchronisation source after, judge that self is the need of as synchronisation source, or after an AP device power-up, judge that self is the need of as synchronisation source.
Preferably, during an AP equipment partly or entirely meeting in following condition, determine that self needs as synchronisation source:
Exist not by the frequency of other AP hold facilities in available frequency;
Has the signal strength signal intensity of the 2nd AP equipment all on an available frequency at least lower than the intensity threshold preset.Namely PCI (Physical Cell Identifier, Physical Cell Identifier) performance numbers all in an available carrier wave is had at least lower than the intensity threshold preset.
Preferably, the signal strength signal intensity of the 2nd AP equipment all on an available frequency is had at least lower than the intensity threshold preset if satisfied condition, and determine that self needs as synchronisation source, then the working frequency points determined has in an available frequency at least.
If an AP equipment determines that self needs as synchronisation source, then need to carry out network configuration
One AP equipment carries out network configuration as synchronisation source and comprises but be not limited at least one in following configuration:
The parameter such as working frequency points, PCI of oneself is selected according to the wireless network environment around self;
Determine that self synchronous number of plies is 0, be first order synchronizer (progression sorts from small to large, and progression sorts also passable from big to small, is such as the highlyest set to 10, be then the 10th grade of synchronizer, lower with) here here;
Configure corresponding network parameter (as sub-frame configuration etc.).
If an AP equipment is determining that self does not need as synchronisation source, and after determining the 2nd AP equipment as synchronisation source, can network configuration be carried out, and carry out synchronous with the synchronisation source determined.
Wherein, an AP equipment carries out network configuration as unsynchronized sources and comprises but be not limited at least one in following configuration:
According to the wireless network environment around self, the PCI list of configuration and frequency list, select the parameters such as suitable frequency and PCI;
Determine the number of plies that self is synchronous, namely with the number of plies+1 of the synchronous unit determined;
Configure corresponding network parameter (as sub-frame configuration etc.).
Wherein, the parameter information of the 2nd AP equipment includes but not limited at least one in following message:
The ascending-descending subframes configuration information of the state information of the 2nd AP equipment, the synchronous number of plies of the 2nd AP equipment, the Synchronization Source of the 2nd AP equipment, the 2nd AP equipment of the 2nd AP equipment.
If the parameter information of the 2nd AP equipment comprises the state information of the 2nd AP equipment, in step 301, as long as an AP equipment receives any information from the 2nd AP equipment, just can determine that the 2nd AP equipment is in synchronous regime.
If the parameter information of the 2nd AP equipment comprises the synchronous number of plies of the 2nd AP equipment, in step 301, an AP equipment is determined the synchronous number of plies of the 2nd AP equipment according to the corresponding relation of subframe numbers in system and the synchronous number of plies or determines the synchronous number of plies of the 2nd AP equipment according to the special frames structure of the 2nd AP equipment.
Concrete, the AP equipment of the different number of plies needs to keep mourning in silence (without any uplink and downlink signals) at corresponding subframe numbers, this corresponding relation is that operator is pre-configured, object reduces interference, and therefore an AP equipment just can know by detecting the subframe numbers of mourning in silence the number of plies that the 2nd AP equipment is corresponding.
Operator or in the protocol can the length of pre-configured several different GP (guard period, interval slots), and the number of plies that different Length Indications is different.One AP equipment can determine GP length in the 2nd AP equipment special frames structure by physical layer search, just can know the synchronous number of plies of the 2nd AP equipment according to the corresponding relation of GP length and the synchronous number of plies.
The corresponding relation of the corresponding relation of GP length and the synchronous number of plies and subframe numbers and the synchronous number of plies can upgrade as required.
Here determine according to subframe numbers or special frames structure, the mode of the synchronous number of plies determines that the mode of the synchronous number of plies is identical with Femto Home eNodeB according to subframe numbers or special frames structure, specifically see 3GPP TdocR2-092304 and 3GPP Tdoc R3-100392, can not repeat them here.
If the parameter information of the 2nd AP equipment comprises the Synchronization Source of the 2nd AP equipment, an AP equipment extracts Synchronization Source from the system message of the 2nd AP equipment received.
If the parameter information of the 2nd AP equipment comprises the ascending-descending subframes configuration information of the 2nd AP equipment, an AP equipment obtains the ascending-descending subframes configuration information of the 2nd AP equipment by the PCI of deciphering the 2nd AP equipment and the mode of downlink port.The mode of concrete acquisition ascending-descending subframes configuration information can see 3GPP TS 36.211/36.212/36.213.
Preferably, if the parameter information of the 2nd AP equipment comprises the state information of the 2nd AP equipment, when carrying out sub-frame configuration, one AP equipment can determine the ascending-descending subframes configuration of the power Qiang community that PCI is corresponding on the available frequency that searches, is then configured according to the ascending-descending subframes of ascending-descending subframes configuration information to self of power Qiang community corresponding to the PCI in self working frequency points.That is, the ascending-descending subframes that the ascending-descending subframes of self is configured to the power Qiang community corresponding with the PCI in the working frequency points of self by an AP equipment is identical, can reduce the interference between community like this.
In step 302, according to parameter information, an AP equipment determines that from the 2nd AP equipment a 2nd AP equipment has a variety of as the mode of synchronisation source, such as selects the 2nd AP equipment that signal quality is best; Select the 2nd AP equipment that the frequency of utilization of working frequency points nearby under network environment is minimum; Select the synchronous number of plies minimum and be in the 2nd AP equipment of synchronous regime; AP equipment due to initial synchronisation needs the system message reading adjacent AP equipment to obtain the information such as the synchronisation source cell ID (such as ECGI) of this adjacent AP equipment, oneself selects synchronisation source community so can also assist according to these information.
If such as on certain available frequency, there is multiple adjacent AP equipment, but the identical synchronisation source of their frequency is different, and the signal strength signal intensity that there is adjacent AP equipment exceeds interference threshold, so the AP equipment of initial synchronisation just can not choose this frequency as working frequency points, if but the synchronisation source of these adjacent AP equipment is identical, so can go to select synchronisation source according to signal quality and the synchronous number of plies.
Preferably, the parameter information of the 2nd AP equipment comprises the state information of the 2nd AP equipment and the synchronous number of plies of the 2nd AP equipment;
In step 302, an AP equipment chooses the 2nd AP equipment (signal quality value of the 2nd AP equipment can be obtained by RF (Radio Frequency, radio frequency) search) that signal quality value is greater than threshold value from all 2nd AP equipment; The 2nd AP equipment being in synchronous regime is picked out from the 2nd AP equipment chosen; From the 2nd AP equipment picked out, select the synchronous number of plies to meet synchronous the 2nd AP equipment required; From the 2nd AP equipment selected, determine that a 2nd AP equipment is as synchronisation source.
Such as synchronous requirement needs to ensure that the number of plies can not be greater than 3, then from the 2nd AP equipment picked out, select the synchronous number of plies to be not more than the 2nd AP equipment of 3.The concrete number of plies can as required or high level arrange.
Further, the parameter information of the 2nd AP equipment can also comprise the Synchronization Source of the 2nd AP equipment;
Accordingly, in step 302, if the Synchronization Source meeting the synchronous all 2nd AP equipment required corresponding selected is identical, from meeting synchronous the 2nd AP equipment required, an AP equipment determines that a 2nd AP equipment specifically comprises as synchronisation source:
If the Synchronization Source part that all 2nd AP equipment meeting synchronous requirement selected are corresponding is identical or complete not identical, 2nd AP equipment of identical working frequency points in the 2nd AP equipment selected divides in a set by the one AP equipment, measure the signal value of each 2nd AP equipment in each set, the set all signal values being all less than signal threshold value, as the first set, is not less than the set of signal threshold value as the second set using only having a signal value; From the first set, select a 2nd AP equipment to be not less than the 2nd AP equipment corresponding to signal threshold value as synchronisation source as synchronisation source or using signal value in the second set.
Further, if do not have the first set and the second set, self as working frequency points, and is carried out network configuration as synchronisation source by other frequencies of AP equipment choice.
Here network configuration is identical with the network configuration that an above-described AP equipment carries out as synchronisation source, does not repeat them here.
Preferably, an AP equipment can be selected to exist in available frequency not by the frequency of other AP hold facilities (because the AP equipment shutdown likely had, so likely occur not by the frequency of other AP hold facilities); If there is no this frequency, the signal strength signal intensity of the 2nd all AP equipment can also be selected lower than the frequency of the intensity threshold preset.
Preferably, after step 303 (after namely initial synchronisation completes), an AP equipment needs periodically to detect, and specifically includes but not limited at least one in following detection:
The detection of PCI time slot;
The interferometry of ascending time slot;
Other Frequency Search and detection.
If detect very strong descending interference on ascending time slot, illustrate that there is ascending-descending subframes configures different adjacent AP equipment and create more serious interference to this AP equipment, so can select other not used or disturb less carrier wave as working frequency points.Otherwise, be disturbed the ascending-descending subframes configuration that serious AP equipment can select the ascending-descending subframes configuration information amendment self according to strong interferers, be consistent to reduce interference.
As shown in Figure 4, embodiment of the present invention AP device power-up is carried out synchronous method and is comprised the following steps:
After step 401, AP device power-up, carry out RF search.
Step 402, AP equipment judge whether exist not by the frequency of other AP hold facilities in available frequency, if so, then perform step 407; Otherwise, perform step 403.
Step 403, AP equipment judge whether to have at least the signal strength signal intensity of the 2nd AP equipment all on an available frequency lower than the intensity threshold preset, and if so, then perform step 407; Otherwise, perform step 404.
Step 404, AP equipment determine ascending-descending subframes configuration information, the state information, the synchronously number of plies and Synchronization Source of adjacent AP equipment.
Step 405, AP equipment, according to state information, the synchronous number of plies and Synchronization Source determination synchronisation source, determine the ascending-descending subframes configuration information of the power Qiang community that PCI in self working frequency points is corresponding.
After step 406, AP equipment determine synchronisation source and working frequency points, the ascending-descending subframes of self configuration is set to the ascending-descending subframes configuration of power Qiang community corresponding to PCI in working frequency points by the AP equipment of initial synchronisation, and after synchronously completing, determine the synchronous number of plies (adding with the number of plies of synchronisation source) of self, enter normal operating state.Preferably, select corresponding frame structure according to the criterion that operator is pre-configured or keep mourning in silence at corresponding subframe numbers; And in the system message of oneself cell ID of broadcast synchronization cell-of-origin so that its synchronisation source of AP recognition of devices of follow-up start.Process ends.
Step 407, AP equipment determine that self needs as synchronisation source, selects not by the parameter such as frequency, PCI used, determines that self synchronous number of plies is 0 simultaneously, be first order synchronizer, enter normal operating state after then configuring corresponding network parameter.
Enumerate several scene to be below described the solution of the present invention.
As shown in Figure 5, AP equipment E detects two adjacent area AP equipment B (working frequency points is f1) and AP equipment C (working frequency points is f1) after powering, by reading the system message of AP equipment B and AP equipment C, AP equipment E knows that AP equipment B and AP equipment C all have chosen AP device A as synchronisation source, then AP equipment E can be AP equipment B or AP equipment C according to principle chooses synchronisation source below: signal quality preferably or the number of plies minimum.
Consider the impact of situation on synchronization accuracy of multi-hop of eating dishes without rice or wine, certain restriction may be carried out to jumping figure, such as support at most that 4 jump, if now the jumping figure of AP equipment B or AP equipment C has been 4, and AP equipment E does not find suitable AP equipment on other frequencies, so now AP equipment E can select other frequency (non-f1 is not used or disturbs less) as working frequency points, the number of plies simultaneously determining self is 0, enters operating state.
As shown in Figure 6, the AP equipment E of new start has searched two adjacent AP equipment B (working frequency points is f1) and AP equipment D (working frequency points is f2) after powering, system message simultaneously by reading AP equipment B and AP equipment D knows that both synchronisation sources are respectively AP device A and AP equipment C, then AP equipment E can be AP equipment B or AP equipment D according to principle chooses synchronisation source below: signal quality preferably or number of plies working frequency points frequency of utilization that is minimum or neighbouring network Zhong Gai community minimum.
As shown in Figure 7, the AP equipment E of new start has searched adjacent AP equipment B and AP equipment D after powering, find that its synchronisation source community is respectively AP device A and AP equipment C by the system message reading AP equipment B and AP equipment D, and working frequency points is all f1, then AP equipment E can be AP equipment B or AP equipment D according to principle chooses synchronisation source below:
The pre-configured threshold value of operator, to E, if the signal of the AP equipment B detected or AP equipment D has one lower than this threshold value, just thinks negligible to the interference of this community, directly selects another community higher than threshold value as synchronisation source;
If the signal of the AP equipment B detected and AP equipment D is all higher than this threshold value, then AP equipment E chooses other frequency (non-f1, and do not used or disturb less) as oneself working frequency points, determine that the number of plies of oneself is 0 simultaneously, enter operating state;
If the signal of the AP equipment B detected and AP equipment D is all lower than this threshold value, the so direct correlation principle according to signal quality and the number of plies is selected oneself synchronisation source community, not consider interference problem.
Based on same inventive concept, additionally provide and a kind ofly carry out synchronous AP equipment in the embodiment of the present invention, the principle of dealing with problems due to AP equipment is with to carry out synchronous method similar, and therefore the enforcement of AP equipment see the enforcement of method, can repeat part and repeat no more.
As shown in Figure 8, the AP equipment of the embodiment of the present invention comprises: processing module 10, synchronisation source determination module 20 and synchronization module 30.
Processing module 10, for when determining that self does not need as synchronisation source, determines the parameter information of each the 2nd adjacent AP equipment.
Synchronisation source determination module 20, the parameter information for determining according to processing module 10 determines that from the 2nd AP equipment a 2nd AP equipment is as synchronisation source.
Synchronization module 30, for carrying out synchronous with the synchronisation source that synchronisation source determination module 20 is determined.
Preferably, processing module 10 determine self need carry out network configuration as during synchronisation source.
Preferably, during processing module partly or entirely meeting in following condition, determine that self needs as synchronisation source:
Exist not by the frequency of other AP hold facilities in available frequency;
Has the signal strength signal intensity of the 2nd AP equipment all on an available frequency at least lower than the intensity threshold preset.
If the parameter information of the 2nd AP equipment comprises the state information of the 2nd AP equipment and the synchronous number of plies of the 2nd AP equipment; Synchronisation source determination module 20 chooses the 2nd AP equipment that signal quality value is greater than threshold value from all 2nd AP equipment; The 2nd AP equipment being in synchronous regime is picked out from the 2nd AP equipment chosen; From the 2nd AP equipment picked out, select the synchronous number of plies to meet synchronous the 2nd AP equipment required; From the 2nd AP equipment selected, determine that a 2nd AP equipment is as synchronisation source.
If the parameter information of the 2nd AP also comprises the Synchronization Source of the 2nd AP equipment, if the Synchronization Source that all 2nd AP equipment of the satisfied synchronous requirement that synchronisation source determination module 20 is selected are corresponding is identical, from the 2nd AP equipment selected, determine that a 2nd AP equipment is as synchronisation source, if the Synchronization Source part that all 2nd AP equipment meeting synchronous requirement selected are corresponding is identical or complete not identical, 2nd AP equipment of identical working frequency points in the 2nd AP equipment selected is divided in a set, the signal value of each 2nd AP equipment in each set of one AP device measuring, all signal values are all less than the set of signal threshold value as the first set, the set of signal threshold value is not less than as the second set using only having a signal value, from the first set, select a 2nd AP equipment to be not less than the 2nd AP equipment corresponding to signal threshold value as synchronisation source as synchronisation source or using signal value in the second set.
If do not have the first set and the second set, synchronisation source determination module 20 selects other frequencies as working frequency points, and self is carried out network configuration as synchronisation source.
If the parameter information of the 2nd AP equipment comprises the state information of the 2nd AP equipment, processing module 10 determines that after receiving the information from the 2nd AP equipment the 2nd AP equipment is in synchronous regime;
If the parameter information of the 2nd AP equipment comprises the synchronous number of plies of the 2nd AP equipment, processing module 10 is determined the synchronous number of plies of the 2nd AP equipment according to the corresponding relation of subframe numbers in system and the synchronous number of plies or determines the synchronous number of plies of the 2nd AP equipment according to the special frames structure of the 2nd AP equipment;
If the parameter information of the 2nd AP equipment comprises the Synchronization Source of the 2nd AP equipment, processing module 10 extracts Synchronization Source from the system message of the 2nd AP equipment received;
If the parameter information of the 2nd AP equipment comprises the ascending-descending subframes configuration information of the 2nd AP equipment, processing module 10 obtains the ascending-descending subframes configuration information of the 2nd AP equipment by the PCI of deciphering the 2nd AP equipment and the mode of downlink port.
Preferably, if the parameter information of the 2nd AP equipment comprises the ascending-descending subframes configuration information of the 2nd AP equipment; Processing module 10 determines the ascending-descending subframes configuration information of the power Qiang community that PCI is corresponding on the available frequency that searches; The ascending-descending subframes of ascending-descending subframes configuration information to self according to power Qiang community corresponding to the PCI in self working frequency points is configured.
Preferably, processing module 10 disconnects and does not have other the 2nd AP equipment can as synchronisation source being connected with synchronisation source, judges that self is the need of as synchronisation source, or after an AP device power-up, judges that self is the need of as synchronisation source.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Because AP equipment can carry out synchronously, thus improve the performance of AP equipment, run for the system (i.e. LTE-LAN system) newly introduced and provide safeguard.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (14)
1. carry out a synchronous method, it is characterized in that, the method comprises:
First access point AP equipment, when determining that self does not need as synchronisation source, determines the parameter information of each the 2nd adjacent AP equipment;
According to described parameter information, a described AP equipment determines that from the 2nd AP equipment a 2nd AP equipment is as synchronisation source;
A described AP equipment carries out synchronous with synchronisation source;
Wherein, the parameter information of described 2nd AP equipment comprises the state information of the 2nd AP equipment and the synchronous number of plies of the 2nd AP equipment;
A described AP equipment is determined to comprise as the 2nd AP equipment of synchronisation source:
A described AP equipment chooses the 2nd AP equipment that signal quality value is greater than threshold value from all 2nd AP equipment;
A described AP equipment picks out the 2nd AP equipment being in synchronous regime from the 2nd AP equipment chosen;
A described AP equipment selects the synchronous number of plies to meet synchronous the 2nd AP equipment required from the 2nd AP equipment picked out;
A described AP equipment determines that a 2nd AP equipment is as synchronisation source from the 2nd AP equipment selected;
The parameter information of described 2nd AP also comprises the Synchronization Source of the 2nd AP equipment;
From meeting synchronous the 2nd AP equipment required, a described AP equipment determines that a 2nd AP equipment comprises as synchronisation source:
If the Synchronization Source meeting the synchronous all 2nd AP equipment required corresponding selected is identical, a described AP equipment determines that a 2nd AP equipment is as synchronisation source from the 2nd AP equipment selected;
If the Synchronization Source part that all 2nd AP equipment meeting synchronous requirement selected are corresponding is identical or complete not identical, 2nd AP equipment of identical working frequency points in the 2nd AP equipment selected divides in a set by a described AP equipment, the signal value of each 2nd AP equipment in each set of one AP device measuring, the set all signal values being all less than signal threshold value, as the first set, is not less than the set of signal threshold value as the second set using only having a signal value; From the first set, select a 2nd AP equipment to be not less than the 2nd AP equipment corresponding to signal threshold value as synchronisation source as synchronisation source or using signal value in the second set.
2. the method for claim 1, is characterized in that, the method also comprises:
A described AP equipment determine self need carry out network configuration as during synchronisation source.
3. method as claimed in claim 1 or 2, is characterized in that, during a described AP equipment partly or entirely meeting in following condition, determines that self needs as synchronisation source:
Exist not by the frequency of other AP hold facilities in available frequency;
Has the signal strength signal intensity of the 2nd AP equipment all on an available frequency at least lower than the intensity threshold preset.
4. the method for claim 1, is characterized in that, the method also comprises:
If do not have the first set and the second set, self, as working frequency points, is carried out network configuration as synchronisation source by described other frequencies of AP equipment choice.
5. the method for claim 1, is characterized in that, a described AP equipment determines that the parameter information of each the 2nd adjacent AP equipment comprises:
If the parameter information of the 2nd AP equipment comprises the state information of the 2nd AP equipment, a described AP equipment determines that after receiving the information from the 2nd AP equipment the 2nd AP equipment is in synchronous regime;
If the parameter information of the 2nd AP equipment comprises the synchronous number of plies of the 2nd AP equipment, a described AP equipment is determined the synchronous number of plies of described 2nd AP equipment according to the corresponding relation of subframe numbers in system and the synchronous number of plies or determines the synchronous number of plies of the 2nd AP equipment according to the special frames structure of the 2nd AP equipment;
If the parameter information of the 2nd AP equipment comprises the Synchronization Source of the 2nd AP equipment, a described AP equipment extracts Synchronization Source from the system message of the 2nd AP equipment received;
If the parameter information of the 2nd AP equipment comprises the ascending-descending subframes configuration information of the 2nd AP equipment, a described AP equipment obtains the ascending-descending subframes configuration information of the 2nd AP equipment by the Physical Cell Identifier PCI of deciphering the 2nd AP equipment and the mode of downlink port.
6. the method for claim 1, is characterized in that, the parameter information of described 2nd AP equipment comprises the ascending-descending subframes configuration information of the 2nd AP equipment;
A described AP equipment also comprises after determining each the 2nd adjacent AP equipment:
A described AP equipment determines the ascending-descending subframes configuration information of the power Qiang community that PCI is corresponding on the available frequency that searches;
A described AP equipment is configured according to the ascending-descending subframes of ascending-descending subframes configuration information to self of power Qiang community corresponding to the PCI in the working frequency points of self.
7. as claim 1,2,5 ~ 6 arbitrary as described in method, it is characterized in that, a described AP equipment disconnects and does not have other the 2nd AP equipment can as synchronisation source being connected with synchronisation source, or after a described AP device power-up, judges that self is the need of as synchronisation source.
8. carry out a synchronous AP equipment, it is characterized in that, this equipment comprises:
Processing module, for when determining that self does not need as synchronisation source, determines the parameter information of each the 2nd adjacent AP equipment;
Synchronisation source determination module, for determining from the 2nd AP equipment that according to described parameter information a 2nd AP equipment is as synchronisation source;
Synchronization module, for carrying out synchronous with synchronisation source;
Wherein, the parameter information of described 2nd AP equipment comprises the state information of the 2nd AP equipment and the synchronous number of plies of the 2nd AP equipment;
Described synchronisation source determination module specifically for:
The 2nd AP equipment that signal quality value is greater than threshold value is chosen from all 2nd AP equipment; The 2nd AP equipment being in synchronous regime is picked out from the 2nd AP equipment chosen; From the 2nd AP equipment picked out, select the synchronous number of plies to meet synchronous the 2nd AP equipment required; From the 2nd AP equipment selected, determine that a 2nd AP equipment is as synchronisation source;
The parameter information of described 2nd AP also comprises the Synchronization Source of the 2nd AP equipment;
Described synchronisation source determination module also for:
If the Synchronization Source meeting the synchronous all 2nd AP equipment required corresponding selected is identical, from the 2nd AP equipment selected, determine that a 2nd AP equipment is as synchronisation source;
If the Synchronization Source part that all 2nd AP equipment meeting synchronous requirement selected are corresponding is identical or complete not identical, 2nd AP equipment of identical working frequency points in the 2nd AP equipment selected is divided in a set, the signal value of each 2nd AP equipment in each set of one AP device measuring, the set all signal values being all less than signal threshold value, as the first set, is not less than the set of signal threshold value as the second set using only having a signal value; From the first set, select a 2nd AP equipment to be not less than the 2nd AP equipment corresponding to signal threshold value as synchronisation source as synchronisation source or using signal value in the second set.
9. equipment as claimed in claim 8, is characterized in that, described processing module also for:
Determine self need carry out network configuration as during synchronisation source.
10. as claimed in claim 8 or 9 equipment, is characterized in that, during described processing module partly or entirely meeting in following condition, determines that self needs as synchronisation source:
Exist not by the frequency of other AP hold facilities in available frequency;
Has the signal strength signal intensity of the 2nd AP equipment all on an available frequency at least lower than the intensity threshold preset.
11. equipment as claimed in claim 8, is characterized in that, described synchronisation source determination module also for:
If there is no the first set and the second set, select other frequencies as working frequency points, self is carried out network configuration as synchronisation source.
12. equipment as claimed in claim 8, is characterized in that, described processing module specifically for:
If the parameter information of the 2nd AP equipment comprises the state information of the 2nd AP equipment, after receiving the information from the 2nd AP equipment, determine that the 2nd AP equipment is in synchronous regime;
If the parameter information of the 2nd AP equipment comprises the synchronous number of plies of the 2nd AP equipment, the corresponding relation according to subframe numbers in system and the synchronous number of plies is determined the synchronous number of plies of described 2nd AP equipment or determines the synchronous number of plies of the 2nd AP equipment according to the special frames structure of the 2nd AP equipment;
If the parameter information of the 2nd AP equipment comprises the Synchronization Source of the 2nd AP equipment, from the system message of the 2nd AP equipment received, extract Synchronization Source;
If the parameter information of the 2nd AP equipment comprises the ascending-descending subframes configuration information of the 2nd AP equipment, obtained the ascending-descending subframes configuration information of the 2nd AP equipment by the mode of the PCI and downlink port that understand the 2nd AP equipment.
13. equipment as claimed in claim 8, is characterized in that, the parameter information of described 2nd AP equipment comprises the ascending-descending subframes configuration information of the 2nd AP equipment;
Described processing module also for:
Determine the ascending-descending subframes configuration information of the power Qiang community that PCI is corresponding on the available frequency that searches; The ascending-descending subframes of ascending-descending subframes configuration information to self according to power Qiang community corresponding to the PCI in self working frequency points is configured.
14. as claim 8,9,12 ~ 13 arbitrary as described in equipment, it is characterized in that, described processing module also for:
Disconnect and do not have other the 2nd AP equipment can as synchronisation source being connected with synchronisation source, or after a described AP device power-up, judging that self is the need of as synchronisation source.
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| US8761142B2 (en) * | 2012-10-19 | 2014-06-24 | Ubiquiti Networks, Inc. | Distributed seamless roaming in wireless networks |
| CN104094647B (en) | 2013-01-29 | 2018-02-06 | 华为技术有限公司 | Synchronous method and base station |
| WO2016019515A1 (en) * | 2014-08-05 | 2016-02-11 | Nokia Solutions And Networks Oy | Controlling synchronization procedure of communication network control elements |
| WO2017007381A1 (en) * | 2015-07-06 | 2017-01-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for determining synchronisation references |
| CN113302991B (en) * | 2019-12-24 | 2022-07-29 | 华为技术有限公司 | Method, device and system for signal synchronization |
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