CN104883746A - Random access method and device - Google Patents
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Abstract
The embodiment of the invention discloses a random access method and device, and relates to the technical field of wireless communication. The method comprises the steps: obtaining a selection threshold value of a multi-address random access mode based on the quality of a communication signal according to the target communication business QoS (quality of service); determining a communication signal quality value corresponding to the selection threshold value; judging whether the communication signal quality value is greater than the selection threshold value or not; selecting a non-orthogonal multi-address random access mode for random access if the communication signal quality value is greater than the selection threshold value; and selecting an orthogonal multi-address random access mode for random access if the communication signal quality value is not greater than the selection threshold value. Through the scheme provided by the embodiment of the invention, the method and device can improve the capacity of network access under the condition of meeting the requirements of communication business QoS.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of accidental access method and device.
Background technology
Along with network technology high speed development, increasing terminal needs access of radio network in wireless communications, each terminal access of radio network all needs corresponding for the resource of access network and the resource for transmitting data, but these resources are limited in wireless network, so, along with the development of wireless network, it is faced with huge challenge on network insertion capacity.
In wireless communications, the multiple access random access mode selected by terminal is the key factor affecting network insertion capacity.From resource multiplex mode, multiple access random access mode can be divided into orthogonal multiple access random access mode and non-orthogonal multiple random access mode two kinds.
Wherein, in orthogonal multiple access random access mode, require that the network insertion resource that terminal is used in wireless communications and data transmission resources are orthogonal, when multiple terminal multiplexing is to consolidated network access-in resource and data transmission resources, because the mutual interference of communication data between user, network terminal cannot correct decoding, and then can cause the failure of terminal access of radio network.During such employing orthogonal multiple access random access mode access network, multiple terminal cannot the identical network insertion resource of concurrent multiplexing and data transmission resources, therefore, cannot promote network insertion capacity.Although there is above-mentioned shortcoming in orthogonal multiple access random access mode, but during by this pattern access of radio network, the communication data interference of communication data to active user of other users is less, even not there is interference, therefore, for various communication service, can obtain preferably QoS (Quality of Service, service quality).
In non-orthogonal multiple random access mode, multiple terminal can multiplexing identical network insertion resource and data transmission resources, and network terminal adopts interference cancellation receiver mode to eliminate interference between user communication data usually.During such employing non-orthogonal multiple random access mode access network, network insertion capacity can be promoted.But in practical application, because interference cancellation receiver mode complexity is higher, and the interference sometimes cannot eliminated completely between user communication data, therefore, adopt non-orthogonal multiple random access mode access network compared with the orthogonal multiple access random access mode access network of employing, poor in the error rate, decoding delay etc., be not suitable for the communication service higher to qos requirement.
Comprehensive above-mentioned several respects reason is visible, in prior art, during accessing terminal to network, if only consider orthogonal multiple access random access mode, or only consider non-orthogonal multiple random access mode, all under the prerequisite meeting communication service qos requirement, network insertion capacity cannot be promoted.
Summary of the invention
The embodiment of the invention discloses a kind of accidental access method and device, with under the prerequisite meeting communication service qos requirement, promote network insertion capacity.
For achieving the above object, the embodiment of the invention discloses a kind of accidental access method, being applied to terminal, described method comprises:
The selection threshold value based on the multiple access random access mode of communication signal quality is obtained according to the service quality QoS of destinations traffic business;
Determine the communication signal quality value that described selection threshold value is corresponding;
Judge whether described communication signal quality value is greater than described selection threshold value;
If be greater than, non-orthogonal multiple random access mode is selected to carry out Stochastic accessing;
Otherwise, select orthogonal multiple access random access mode to carry out Stochastic accessing.
In a kind of specific implementation of the present invention, the described service quality QoS according to destinations traffic business obtains the selection threshold value based on the multiple access random access mode of communication signal quality, comprising:
According to the communication signal quality value preset and the service quality QoS of destinations traffic business, obtain the selection threshold value of multiple access random access mode;
Or
Receive the selection threshold value of the multiple access random access mode that network terminal is sent by broadcast channel or control channel,
Wherein, described selection threshold value is:
Described network terminal, when meeting the service quality QoS requirements preset, obtains according to the performance parameter of described network terminal receiver; Or
Described network terminal, when meeting the service quality QoS of described destinations traffic business, obtains according to the performance parameter of described network terminal receiver.
In a kind of specific implementation of the present invention, described communication signal quality value is:
Present terminal sends Signal-to-Noise; Or
Present terminal receives information signal to noise ratio.
In a kind of specific implementation of the present invention, described selection non-orthogonal multiple random access mode carries out Stochastic accessing, comprising:
Determine that present terminal is group switching centre terminal or non-group center terminal, wherein, group switching centre terminal is the terminal sending beacon message in the current Stochastic accessing cycle to described network terminal;
If present terminal is group switching centre terminal, after sending beacon message with broadcast mode, find in remaining pairing the terminal identification information obtaining non-present terminal in resource; According to obtained terminal identification information, select to preset X terminal, set up nonopiate Stochastic accessing group; A targeting sequencing is selected arbitrarily in available targeting sequencing, and with the indication information of targeting sequencing selected by broadcast mode transmission and the terminal identification information of a selected X terminal; By Physical Random Access Channel PRACH to the targeting sequencing selected by described network terminal transmission; Receive the accidental access response that described network terminal is sent by physical down channel;
If present terminal is not group switching centre terminal, after group switching centre terminal transmitting terminal identification information, receive group switching centre terminal with the indication information of targeting sequencing selected by broadcast mode transmission and the terminal identification information of a selected X terminal; According to the terminal identification information of a selected X terminal, judge whether the mark of present terminal belongs to X terminal of described group switching centre terminal selection; If belong to, receive the accidental access response that described network terminal is sent by physical down channel after receiving the targeting sequencing that group switching centre terminal sent by PRACH;
Wherein, at least comprise in described accidental access response: described network terminal be present terminal distribute, for sending the mark P of the Physical Uplink Shared Channel PUSCH of schedule information and/or service data information
iD;
The Uplink Shared Channel PUSCH indicated in described accidental access response sends schedule information and/or service data information to described network terminal;
Receive described network terminal according to the feedback information sent the analysis result of described schedule information and/or service data information.
In a kind of specific implementation of the present invention, describedly judge whether present terminal is group switching centre terminal, comprising:
Find to determine communication information sending time slots in resource in pairing, wherein, the described communication information is the terminal identification information of beacon message or present terminal;
Before described communication information sending time slots arrives, detect the beacon message that pairing finds whether to have existed in resource the transmission of non-present terminal;
If the beacon message that non-present terminal sends do not detected before described communication information sending time slots arrives, on described communication information sending time slots, send beacon message, and judge that present terminal is as group switching centre terminal;
If the beacon message that non-present terminal sends detected before described communication information sending time slots arrives, on described communication information sending time slots, send the terminal identification information of present terminal, and judge that present terminal is as non-group center terminal.
In a kind of specific implementation of the present invention, described according to obtained terminal identification information, select to preset X terminal, before setting up nonopiate Stochastic accessing group, also comprise:
According to service quality QoS and the described selection threshold value of described destinations traffic business, determine the maximum number of user n allowing access when adopting non-orthogonal multiple random access mode to carry out Stochastic accessing
nOMA.
In a kind of specific implementation of the present invention, described according to obtained terminal identification information, select to preset X terminal, set up nonopiate Stochastic accessing group, comprising:
According to the degree of closeness order from high to low between the path loss values of each terminal and the path loss values of present terminal, according to obtained terminal identification information, select min (n
nOMA-1, n
f) individual terminal, set up nonopiate Stochastic accessing group, wherein, min () represents minimum parameter choice function, n
frepresent the quantity of the terminal identification information obtained.
For achieving the above object, the embodiment of the invention discloses a kind of accidental access method, being applied to network terminal, described method comprises:
Determine to select threshold value, send described selection threshold value to terminal, select the random access mode that will adopt when carrying out Stochastic accessing to make described terminal according to described selection threshold value;
Wherein, described selection threshold value is:
When meeting the service quality QoS requirements preset, obtain according to the performance parameter of network terminal receiver; Or
Network termination when meeting the service quality QoS requirements of described destinations traffic business, obtains according to the performance parameter of described network terminal receiver after receiving the service quality QoS of the destinations traffic business that terminal sends.
According to the random access mode selected by described terminal, carry out Stochastic accessing with described terminal.
In a kind of specific implementation of the present invention, when the random access mode selected by described terminal is nonopiate random access mode, described according to the random access mode selected by described terminal, carry out Stochastic accessing with described terminal, comprising:
After receiving the targeting sequencing that group switching centre terminal sent by Physical Random Access Channel PRACH, accidental access response is sent to each terminal in nonopiate Stochastic accessing group by physical down channel, wherein, at least comprise in accidental access response: described network terminal be terminal distribution, for sending the mark P of the Physical Uplink Shared Channel PUSCH of schedule information and/or service data information
iD, described nonopiate Stochastic accessing group is: described group switching centre terminal is set up according to the terminal identification information of the non-group center terminal finding to obtain in resource in pairing;
Receive schedule information and/or service data information that each terminal in described nonopiate Stochastic accessing group sent by the Uplink Shared Channel PUSCH indicated in accidental access response;
Received schedule information and/or service data information are resolved, and the analysis result for each terminal in described nonopiate Stochastic accessing group is fed back to each terminal.
For achieving the above object, the embodiment of the invention discloses a kind of accidental access device, being applied to terminal, described device comprises:
Threshold value is selected to obtain module, for obtaining the selection threshold value based on the multiple access random access mode of communication signal quality according to the service quality QoS of destinations traffic business;
Communication signal quality determination module, for determining the communication signal quality value that described selection threshold value is corresponding;
Communication signal quality value judge module, for judging whether described communication signal quality value is greater than described selection threshold value;
First Stochastic accessing module, for when the judged result of described communication signal quality value judge module is for being, selects non-orthogonal multiple random access mode to carry out Stochastic accessing;
Second Stochastic accessing module, for when the judged result of described communication signal quality value judge module is for being, selects orthogonal multiple access random access mode to carry out Stochastic accessing.
For achieving the above object, the embodiment of the invention discloses a kind of accidental access device, being applied to network terminal, described device also comprises:
Select threshold value determination module, for sending described selection threshold value to terminal, select the random access mode that will adopt when carrying out Stochastic accessing according to described selection threshold value to make described terminal;
Wherein, described selection threshold value is:
When meeting the service quality QoS requirements preset, obtain according to the performance parameter of network terminal receiver; Or
Network termination when meeting the service quality QoS requirements of described destinations traffic business, obtains according to the performance parameter of described network terminal receiver after receiving the service quality QoS of the destinations traffic business that terminal sends;
3rd Stochastic accessing module, for according to the random access mode selected by described terminal, carries out Stochastic accessing with described terminal.
As seen from the above, in the scheme that the embodiment of the present invention provides, first present terminal obtains the selection threshold value based on the multiple access random access mode of communication signal quality according to the QoS of destinations traffic business, and then determine the communication signal quality value that selection threshold value is corresponding, and according to the relativeness between determined communication signal quality value and selection threshold value, determine to select orthogonal multiple access random access mode to carry out Stochastic accessing, non-orthogonal multiple random access mode still will be selected to carry out Stochastic accessing.Due under the qos requirement of destinations traffic business, if above-mentioned communication signal quality value is greater than selection threshold value, illustrate that the qos requirement of destinations traffic business is lower, thus, non-orthogonal multiple random access mode is adopted to carry out communicating, can not only be met it like this and require quality of service requirement, network insertion amount can also be promoted; If above-mentioned communication signal quality value is not more than selection threshold value, illustrate that the qos requirement of communication service is higher, when communicating owing to adopting non-orthogonal multiple random access mode, the error rate, decoding delay etc. are higher, so, adopt orthogonal multiple access random access mode to carry out Stochastic accessing better.More than comprehensive, the scheme that the application embodiment of the present invention provides, under the prerequisite meeting communication service qos requirement, can promote network insertion capacity.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic flow sheet of a kind of accidental access method that Fig. 1 provides for the embodiment of the present invention;
A kind of schematic flow sheet adopting non-orthogonal multiple random access mode to carry out the method for Stochastic accessing that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 a kind ofly in prior art adopts orthogonal multiple access random access mode to carry out the schematic flow sheet of the method for Stochastic accessing;
The schematic flow sheet of the another kind of accidental access method that Fig. 4 provides for the embodiment of the present invention;
The structural representation of a kind of accidental access device that Fig. 5 provides for the embodiment of the present invention;
A kind of structural representation adopting non-orthogonal multiple random access mode to carry out the device of Stochastic accessing that Fig. 6 provides for the embodiment of the present invention;
The structural representation of the another kind of accidental access device that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The schematic flow sheet of a kind of accidental access method that Fig. 1 provides for the embodiment of the present invention, the method is applied to terminal, comprising:
S101: obtain the selection threshold value based on the multiple access random access mode of communication signal quality according to the service quality QoS of destinations traffic business.
In this step, according to the service quality QoS of predefined communication signal quality value and destinations traffic business, obtain the selection threshold value of multiple access random access mode, such as, pre-set multiple communication signal quality value, and the corresponding relation arranged between each value and QoS of communication service, after the QoS determining destinations traffic business, from the multiple communication signal quality values pre-set, selection threshold value as multiple access random access mode etc. is selected according to above-mentioned corresponding relation, in this case, threshold value is selected to be determined by terminal.
The selection threshold value of the multiple access random access mode that network terminal is sent by broadcast channel or control channel can also be received, wherein, described selection threshold value can be a value, also can be multiple value, concrete, select threshold value can be that network terminal is when meeting the service quality QoS requirements preset, obtain according to the performance parameter of this network terminal receiver, in addition, select threshold value can also be network terminal when meeting the service quality QoS requirements of destinations traffic business, obtain according to the performance parameter of this network terminal receiver.Present terminal directly can obtain the selection threshold value corresponding with the service quality QoS of destinations traffic business from network terminal, also after can obtaining multiple selection threshold value from the network terminal, then the selection threshold value corresponding according to the QoS select target communication service of destinations traffic business.In this case, select threshold value to be determined by network terminal, or jointly determined by network terminal and present terminal.
Concrete, above-mentioned selection threshold value, network terminal snr of received signal that can be corresponding with the QoS of destinations traffic business, network terminal send information signal to noise ratio, present terminal snr of received signal, present terminal send Signal-to-Noise etc., and the application does not limit this.
S102: determine the communication signal quality value selecting threshold value corresponding.
Obtain the selection threshold value of multiple access random access mode in terminal after, can the QoS of combining target communication service, predict this communication signal quality value corresponding to selection threshold value, wherein, above-mentioned communication signal quality value can be that present terminal sends Signal-to-Noise, can also be that present terminal receives information signal to noise ratio, the application limit this.
S103: judge whether communication signal quality value is greater than above-mentioned selection threshold value, if be greater than, performs S104, otherwise, perform S105.
Due to communication quality when above-mentioned communication signal quality value can reflect that present terminal and network terminal carry out data communication to a certain extent, and select threshold value based on communication signal quality, so, when communication signal quality value is greater than selection threshold value, illustrate that the communication quality of present terminal and network terminal is better, select non-orthogonal multiple random access mode to carry out Stochastic accessing, number of access terminals in unit resource can be improved; When communication signal quality value is not more than selection threshold value, illustrates that the communication quality of present terminal and network terminal is poor, select orthogonal multiple access random access mode to carry out Stochastic accessing, farthest can ensure communication quality.
S104: select non-orthogonal multiple random access mode to carry out Stochastic accessing.
S105: select orthogonal multiple access random access mode to carry out Stochastic accessing.
As seen from the above, in the scheme that the present embodiment provides, first present terminal obtains the selection threshold value of multiple access random access mode according to the QoS of destinations traffic business, then the communication signal quality value corresponding with selecting threshold value is calculated, the communication signal quality value of calculating is compared with selecting threshold value, determine to select orthogonal multiple access random access mode to carry out Stochastic accessing, or select non-orthogonal multiple random access mode to carry out Stochastic accessing.Due under the qos requirement of destinations traffic business, if above-mentioned communication signal quality value is greater than selection threshold value, illustrate that the communication quality of present terminal and network terminal is better, select non-orthogonal multiple random access mode to carry out Stochastic accessing, number of access terminals in unit resource can be improved; If above-mentioned communication signal quality value is not more than when selecting threshold value, illustrates that the communication quality of front terminal and network terminal is poor, adopt orthogonal multiple access random access mode to carry out Stochastic accessing better.Time again owing to adopting non-orthogonal multiple random access mode to communicate, the performance such as the error rate and/or decoding delay may be worse than orthogonal multiple access random access mode.More than comprehensive, the scheme that application the present embodiment provides, under the prerequisite meeting communication service qos requirement, can promote network insertion capacity.
Different according to resource multiplex mode, random access mode can be divided into non-orthogonal multiple random access mode and orthogonal multiple access random access mode, introduces the random access procedure adopting non-orthogonal multiple random access mode and the random access procedure adopting orthogonal multiple access random access mode respectively below by specific embodiment.
In one particular embodiment of the present invention, see Fig. 2, provide a kind of schematic flow sheet adopting non-orthogonal multiple random access mode to carry out the method for Stochastic accessing, in the present embodiment, above-mentioned S104 step, select non-orthogonal multiple random access mode to carry out Stochastic accessing, comprising:
S104A: determine whether present terminal is group switching centre terminal, if yes, performs S104B, otherwise, perform S104G.
Wherein, group switching centre terminal is the terminal sending beacon in the current Stochastic accessing cycle to network terminal.
Within a Stochastic accessing cycle, the pairing that the every multiple subcarrier of several time slot allocation of network terminal is used as between terminal finds.
Concrete, in a kind of implementation of the present invention, can judge whether present terminal is group switching centre terminal by following steps:
Find to determine communication information sending time slots in resource in pairing, wherein, the communication information is the terminal identification information of beacon message or present terminal;
Before communication information sending time slots arrives, detect the beacon message that pairing finds whether to have existed in resource the transmission of non-present terminal;
If do not detect before communication information sending time slots arrives and send beacon message by the beacon message that non-present terminal sends on communication information sending time slots, and judge that present terminal is as group switching centre terminal;
If the beacon message that non-present terminal sends detected before communication information sending time slots arrives, on communication information sending time slots, send the terminal identification information of present terminal, and judge that present terminal is as non-group center terminal.
It should be noted that, in above-mentioned terminal identification information, can comprise the terminal iidentification of present terminal, can also comprise the path loss values of present terminal, certainly, can also comprise other information, the application does not limit this.
S104B: after sending beacon message with broadcast mode, finds in remaining pairing the terminal identification information obtaining non-present terminal in resource.
If the pairing that present terminal obtains finds that the terminal iidentification of already present non-present terminal in resource is for empty, then can think that terminal is matched unsuccessfully.
S104C: according to obtained terminal identification information, selects to preset X terminal, sets up nonopiate Stochastic accessing group.
Be understandable that, the terminal identification information that present terminal obtains can have multiple, but, due to the impact of the factors such as channel capacity, the equal access network end of terminal that all terminal identification information often cannot be allowed corresponding, so, needing from terminal corresponding to obtained terminal identification information, to select several terminals according to presetting terminal number, generating nonopiate Stochastic accessing group.
When selecting terminal, the relativeness between the path loss values corresponding with present terminal according to the path loss values that each terminal is corresponding can select, can certainly select according to other rules.
S104D: select a targeting sequencing arbitrarily in available targeting sequencing, and with the indication information of targeting sequencing selected by broadcast mode transmission and the terminal identification information of a selected X terminal.
When present terminal leads sequence before the selection, can be random select in current available targeting sequencing.
S104E: by Physical Random Access Channel PRACH to the targeting sequencing selected by network terminal transmission.
S104F: receive the accidental access response that network terminal is sent by physical down channel.
Wherein, at least comprise in accidental access response: network terminal be present terminal distribute, for sending the mark P of the Physical Uplink Shared Channel PUSCH of schedule information and/or service data information
iD.
S104G: after group switching centre terminal transmitting terminal identification information, receives group switching centre terminal with the indication information of targeting sequencing selected by broadcast mode transmission and the terminal identification information of a selected X terminal.
S104H: according to the terminal identification information of a selected X terminal, judges whether the mark of present terminal belongs to X terminal of group switching centre terminal described above selection, if belong to, performs S104I, otherwise, perform S104L.
S104I: receive the accidental access response that network terminal is sent by physical down channel after receiving the targeting sequencing that group switching centre terminal sent by PRACH.
Accidental access response in this step is consistent with the accidental access response in S104F, no longer describes in detail here.
S104J: the Uplink Shared Channel PUSCH indicated in accidental access response sends schedule information and/or service data information to network terminal.
Targeting sequencing corresponding to each terminal in nonopiate access group is same targeting sequencing, so, each terminal in this nonopiate access group all can receive the accidental access response that network terminal is sent by physical down channel, like this, network terminal also can receive schedule information and/or the service data information of each terminal transmission in this nonopiate access group.
S104K: receive network terminal according to the feedback information sent the analysis result of schedule information and/or service data information.
Network termination receive multiple terminal send schedule information and/or service data information after, because resource multiplexing between each information is identical, so can interference phenomenon be there is each other, network terminal, when resolving received information, need carry out interference delete to the information of each user, demodulation, the steps such as decoding, according to decode results, network terminal judges that the information which terminal sends is correct, and the information which terminal sends is wrong.
Network terminal, after resolving received information, need send to each terminal analysis result, can know whether access successfully to make each terminal.Certainly, in practical application, network terminal also can only to the client feedback information that the information of correct decoding is corresponding, if terminal does not receive feedback information within the time of presetting, then think and need random access failure to re-start Stochastic accessing after random back.
S104L: process ends.
In the optional implementation of one of the present invention, according to obtained terminal identification information, select a predetermined number terminal, before setting up nonopiate Stochastic accessing group, above-mentioned accidental access method also comprises:
According to QoS and the above-mentioned selection threshold value of destinations traffic business, determine the maximum number of user n allowing access when adopting non-orthogonal multiple random access mode to carry out Stochastic accessing
nOMA.
Optionally, the maximum number of user n of access is allowed when can set up the QoS of communication service in advance, select thresholding and adopt non-orthogonal multiple random access mode to carry out Stochastic accessing
nOMAcorresponding relation between three, calculate the communication signal quality value corresponding with selecting threshold value, when meeting the qos requirement of destinations traffic business, determine according to above-mentioned corresponding relation the maximum number of user n allowing access when adopting non-orthogonal multiple random access mode to carry out Stochastic accessing
nOMA.
Table 1 gives the QoS of communication service, allows the maximum number of user n of access when selecting thresholding and adopt non-orthogonal multiple random access mode to carry out Stochastic accessing
nOMAthe example of corresponding relation.
Table 1
Value according to QoS determines row information in table 1 above, determines to determine column information in table 1 above according to the calculated communication signal quality value corresponding with selecting threshold value, then combines according to determined row information and column information and obtain n
nOMAvalue.
A point situation is described below:
Situation one, supposes that the value of QoS is X
2, the communication signal quality value corresponding with selecting threshold value calculated is Y, Y < Y
2,1, then n
nOMAvalue be 1
Situation two, supposes that the value of QoS is X
2, the communication signal quality value corresponding with selecting threshold value calculated is Y, Y
2,1≤ Y<Y
2,2, then n
nOMAvalue be 2;
Situation three, supposes that the value of QoS is X
2, the communication signal quality value corresponding with selecting threshold value calculated is Y, Y
2,2≤ Y<Y
2,3, then n
nOMAvalue be 3;
Situation four, supposes that the value of QoS is X
2, the communication signal quality value corresponding with selecting threshold value calculated is Y, Y > Y
2, N-1, then n
nOMAvalue be N, wherein, N is the maximum number of user of nonopiate access.
Preferably, according to obtained terminal identification information, select a predetermined number terminal, set up nonopiate Stochastic accessing group, can be according to the degree of closeness order from high to low between the path loss values of each terminal and the path loss values of present terminal, according to obtained terminal identification information, select min (n
nOMA-1, n
f) individual terminal, set up nonopiate Stochastic accessing group, wherein, min () represents minimum parameter choice function, n
frepresent the quantity of the terminal identification information obtained.
As seen from the above, in the scheme that the present embodiment provides, multiple terminal multiplexing identical resource can carry out Stochastic accessing, so can promote access capacity.
In another specific embodiment of the present invention, see Fig. 3, provide and a kind ofly adopt orthogonal multiple access random access mode to carry out the schematic flow sheet of the method for Stochastic accessing, in the present embodiment, above-mentioned S105 step, select orthogonal multiple access random access mode to carry out Stochastic accessing, comprising:
S105A: select targeting sequencing, and by PRACH to the targeting sequencing selected by network terminal transmission.
S105B: receive the accidental access response that network terminal is sent by physical down channel.
Wherein, at least comprise in accidental access response: network terminal be present terminal distribute, for sending the mark P of the Physical Uplink Shared Channel PUSCH of schedule information and/or service data information
iD.
S105C: the Uplink Shared Channel PUSCH indicated in accidental access response sends schedule information and/or service data information to network terminal.
S105D: receive network terminal according to the feedback information sent the analysis result of schedule information and/or service data information.
Be more than adopt orthogonal multiple access random access mode to carry out a kind of method of Stochastic accessing in prior art, other methods adopting orthogonal multiple access random access mode to carry out Stochastic accessing also can be applied to above-mentioned each and implement, in the accidental access method provided, to will not enumerate here.
The schematic flow sheet of the another kind of accidental access method that Fig. 4 provides for the embodiment of the present invention, the method is applied to network terminal, comprising:
S401: determine to select threshold value, send this selection threshold value to terminal, selects the random access mode that will adopt when carrying out Stochastic accessing according to this selection threshold value to make terminal.
Concrete, above-mentioned selection threshold value can be that current network end is when meeting the service quality QoS requirements preset, obtain according to the performance parameter of current network end receiver, can also be after current network termination receives the service quality QoS of the destinations traffic business that terminal sends, when meeting the service quality QoS requirements of destinations traffic business, obtain according to the performance parameter of current network end receiver.
Different according to resource multiplex mode, random access mode can be divided into non-orthogonal multiple random access mode and orthogonal multiple access random access mode.Terminal can be selected between non-orthogonal multiple random access mode and orthogonal multiple access random access mode according to above-mentioned selection threshold value.
Concrete, in a kind of specific implementation, terminal can select random access mode in the following manner:
Terminal, according to above-mentioned selection threshold value, determines the communication signal quality value selecting threshold value corresponding;
Judge whether above-mentioned communication signal quality value is greater than and state selection threshold value;
If be greater than, non-orthogonal multiple random access mode is selected to carry out Stochastic accessing;
Otherwise, select orthogonal multiple access random access mode to carry out Stochastic accessing.
S402: according to the random access mode selected by terminal, carries out Stochastic accessing with terminal.
In a kind of specific implementation, when the random access mode selected by terminal is nonopiate random access mode, according to the random access mode selected by terminal, when carrying out Stochastic accessing with terminal, after receiving the targeting sequencing that group switching centre terminal sent by Physical Random Access Channel PRACH, accidental access response is sent to each terminal in nonopiate Stochastic accessing group by physical down channel, then schedule information and/or service data information that each terminal in nonopiate Stochastic accessing group sent by the Uplink Shared Channel PUSCH indicated in accidental access response is received, received schedule information and/or service data information are resolved, and the analysis result for each terminal in nonopiate Stochastic accessing group is fed back to each terminal.
Wherein, at least comprise in accidental access response: network terminal be terminal distribution, for sending the mark P of the Physical Uplink Shared Channel PUSCH of schedule information and/or service data information
iD, nonopiate Stochastic accessing group is: group switching centre terminal is set up according to the terminal identification information of the non-group center terminal finding to obtain in resource in pairing.
When the random access mode selected by terminal is Random Orthogonal access module, can accidental access method of the prior art be passed through, according to the random access mode selected by terminal, carry out Stochastic accessing with terminal, repeat no more here.
As seen from the above, in the scheme that the present embodiment provides, terminal is before carrying out Stochastic accessing, random access mode can be selected according to selection threshold value, instead of set not modifiable random access mode in advance, so, in the good situation of communication quality of present terminal and network terminal, non-orthogonal multiple random access mode can be selected to carry out Stochastic accessing, number of access terminals in unit resource can be improved, when the communication quality of front terminal and network terminal is poor, orthogonal multiple access random access mode can be adopted to carry out Stochastic accessing better.Time again owing to adopting non-orthogonal multiple random access mode to communicate, the performance such as the error rate and/or decoding delay may be worse than orthogonal multiple access random access mode.More than comprehensive, the scheme that application the present embodiment provides, under the prerequisite meeting communication service qos requirement, can promote network insertion capacity.
Corresponding with above-mentioned accidental access method, the embodiment of the present invention additionally provides a kind of accidental access device.
The structural representation of a kind of accidental access device that Fig. 5 provides for the embodiment of the present invention, this application of installation, in terminal, comprising:
Threshold value is selected to obtain module 501, for obtaining the selection threshold value based on the multiple access random access mode of communication signal quality according to the service quality QoS of destinations traffic business;
Communication signal quality determination module 502, for determining the communication signal quality value that described selection threshold value is corresponding;
Communication signal quality value judge module 503, for judging whether described communication signal quality value is greater than described selection threshold value;
First Stochastic accessing module 504, for when the judged result of described communication signal quality value judge module is for being, selects non-orthogonal multiple random access mode to carry out Stochastic accessing;
Second Stochastic accessing module 505, for when the judged result of described communication signal quality value judge module is for being, selects orthogonal multiple access random access mode to carry out Stochastic accessing.
Concrete, described selection threshold value obtains module 501,
Specifically for the service quality QoS according to the communication signal quality value preset and destinations traffic business, the selection threshold value of multiple access random access mode can be obtained;
Or
The selection threshold value of the multiple access random access mode of broadcast channel or control channel transmission can be passed through specifically for receiving network terminal,
Wherein, described selection threshold value is:
Described network terminal, when meeting the service quality QoS requirements preset, obtains according to the performance parameter of described network terminal receiver; Or
Described network terminal, when meeting the service quality QoS requirements of described destinations traffic business, obtains according to the performance parameter of described network terminal receiver.
Concrete, described communication signal quality value can be:
Present terminal sends Signal-to-Noise; Or
Present terminal receives information signal to noise ratio.
As seen from the above, in the scheme that the present embodiment provides, first present terminal obtains the selection threshold value based on the multiple access random access mode of communication signal quality according to the QoS of destinations traffic business, and then determine the communication signal quality value that selection threshold value is corresponding, and according to the relativeness between determined communication signal quality value and selection threshold value, determine to select orthogonal multiple access random access mode to carry out Stochastic accessing, non-orthogonal multiple random access mode still will be selected to carry out Stochastic accessing.Due under the qos requirement of destinations traffic business, if above-mentioned communication signal quality value is greater than selection threshold value, illustrate that the qos requirement of destinations traffic business is lower, thus, non-orthogonal multiple random access mode is adopted to carry out communicating, can not only be met it like this and require quality of service requirement, network insertion amount can also be promoted; If above-mentioned communication signal quality value is not more than selection threshold value, illustrate that the qos requirement of communication service is higher, when communicating owing to adopting non-orthogonal multiple random access mode, the error rate, decoding delay etc. are higher, so, adopt orthogonal multiple access random access mode to carry out Stochastic accessing better.More than comprehensive, the scheme that application the present embodiment provides, under the prerequisite meeting communication service qos requirement, can promote network insertion capacity.
In one particular embodiment of the present invention, see Fig. 6, provide a kind of structural representation adopting non-orthogonal multiple random access mode to carry out the device of Stochastic accessing, compared with previous embodiment, in the present embodiment, described first Stochastic accessing module 504, comprising:
Terminal determination submodule 50401, for determining that present terminal is group switching centre terminal or non-group center terminal, wherein, group switching centre terminal is the terminal sending beacon in the current Stochastic accessing cycle to described network terminal;
Terminal iidentification obtains submodule 50402, for when described terminal determination submodule 50401 determines that present terminal is group switching centre terminal, after sending beacon message with broadcast mode, find in remaining pairing the terminal identification information obtaining non-present terminal in resource;
Nonopiate Stochastic accessing sets up vertical submodule 50403, for according to obtained terminal identification information, selects to preset X terminal, sets up nonopiate Stochastic accessing group;
Information sends submodule 50404, for selecting a targeting sequencing arbitrarily in available targeting sequencing, and with the indication information of targeting sequencing selected by broadcast mode transmission and the terminal identification information of a selected X terminal;
Targeting sequencing sends submodule 50405, for passing through Physical Random Access Channel PRACH to the targeting sequencing selected by described network terminal transmission;
First accidental access response receives submodule 50406, for receiving the accidental access response that described network terminal is sent by physical down channel;
Receives information submodule 50407, for when described terminal determination submodule 50401 determines that present terminal is not group switching centre terminal, after group switching centre terminal transmitting terminal identification information, receive group switching centre terminal send with broadcast mode selected by targeting sequencing indication information and the terminal identification information of selected X terminal;
Terminal iidentification judges submodule 50408, for the terminal identification information according to a selected X terminal, judges whether the mark of present terminal belongs to X terminal of described group switching centre terminal selection;
Second accidental access response receives submodule 50409, for when described terminal iidentification judges the judged result of submodule 50408 for being, receive the accidental access response that described network terminal is sent by physical down channel after receiving the targeting sequencing that group switching centre terminal sent by PRACH;
Scheduling or business information send submodule 50410, on the Uplink Shared Channel PUSCH indicated in described accidental access response, send schedule information and/or service data information to described network terminal;
Feedback information receives submodule 50411, for receiving described network terminal according to the feedback information sent the analysis result of described schedule information and/or service data information;
Wherein, at least comprise in described accidental access response: described network terminal be present terminal distribute, for sending the mark P of the Physical Uplink Shared Channel PUSCH of schedule information and/or service data information
iD.
Concrete, described terminal judges submodule 50401 can comprise:
Information sending time slots determining unit, determine communication information sending time slots for finding in pairing in resource, wherein, the described communication information is the terminal identification information of beacon message or present terminal;
Beacon message detecting unit, before arriving at described communication information sending time slots, detects the beacon message that pairing finds whether to have existed in resource the transmission of non-present terminal;
Beacon message transmitting element, if for the beacon message that non-present terminal sends not detected before described communication information sending time slots arrives, sending beacon message, and judging that present terminal is as group switching centre terminal on described communication information sending time slots;
Terminal identification information transmitting element, if the beacon message that non-present terminal sends detected before arriving at described communication information sending time slots, on described communication information sending time slots, send the terminal identification information of present terminal, and judge that present terminal is as non-group center terminal.
In a preferred embodiment of the invention, above-mentioned accidental access device can also comprise:
Maximum number of user determination module, before generating nonopiate Stochastic accessing group at the vertical submodule 50403 of described nonopiate Stochastic accessing establishment, according to described QoS and described selection threshold value, determine the maximum number of user n allowing access when adopting non-orthogonal multiple random access mode to carry out Stochastic accessing
nOMA.
Preferably, nonopiate Stochastic accessing sets up vertical submodule 50403, specifically for according to the degree of closeness order from high to low between the path loss values of each terminal and the path loss values of present terminal, according to obtained terminal identification information, min (n can be selected
nOMA-1, n
f) individual terminal, set up nonopiate Stochastic accessing group, wherein, min () represents minimum parameter choice function, n
frepresent the quantity of the terminal identification information obtained.
As seen from the above, in the scheme that the present embodiment provides, multiple terminal multiplexing identical resource can carry out Stochastic accessing, so can promote access capacity.
The structural representation of the another kind of accidental access device that Fig. 7 provides for the embodiment of the present invention, this application of installation, in network terminal, comprising:
Select threshold value determination module 701, selecting threshold value for determining, sending described selection threshold value to terminal, select the random access mode that will adopt when carrying out Stochastic accessing to make described terminal according to described selection threshold value;
Wherein, described selection threshold value is:
When meeting the service quality QoS requirements preset, obtain according to the performance parameter of network terminal receiver; Or
Network termination when meeting the service quality QoS requirements of described destinations traffic business, obtains according to the performance parameter of described network terminal receiver after receiving the service quality QoS of the destinations traffic business that terminal sends.
3rd Stochastic accessing module 702, for according to the random access mode selected by described terminal, carries out Stochastic accessing with described terminal.
Concrete, when the random access mode selected by described terminal is nonopiate random access mode, described 3rd Stochastic accessing module 702, comprising:
Accidental access response sends submodule, for after receiving the targeting sequencing that group switching centre terminal sent by Physical Random Access Channel PRACH, accidental access response is sent to each terminal in nonopiate Stochastic accessing group by physical down channel, wherein, at least comprise in accidental access response: described network terminal be terminal distribution, for sending the mark P of the Physical Uplink Shared Channel PUSCH of schedule information and/or service data information
iD, described nonopiate Stochastic accessing group is: described group switching centre terminal is set up according to the terminal identification information of the non-group center terminal finding to obtain in resource in pairing;
Dispatching services receives information submodule, for receiving the schedule information and/or service data information that each terminal in described nonopiate Stochastic accessing group sent by the Uplink Shared Channel PUSCH indicated in accidental access response;
Analysis result feedback submodule, for resolving received schedule information and/or service data information, and feeds back to each terminal by the analysis result for each terminal in described nonopiate Stochastic accessing group.
As seen from the above, in the scheme that the present embodiment provides, terminal is before carrying out Stochastic accessing, random access mode can be selected according to selection threshold value, instead of set not modifiable random access mode in advance, so, in the good situation of communication quality of present terminal and network terminal, non-orthogonal multiple random access mode can be selected to carry out Stochastic accessing, number of access terminals in unit resource can be improved, when the communication quality of front terminal and network terminal is poor, orthogonal multiple access random access mode can be adopted to carry out Stochastic accessing better.Time again owing to adopting non-orthogonal multiple random access mode to communicate, the performance such as the error rate and/or decoding delay may be worse than orthogonal multiple access random access mode.More than comprehensive, the scheme that application the present embodiment provides, under the prerequisite meeting communication service qos requirement, can promote network insertion capacity.
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
One of ordinary skill in the art will appreciate that all or part of step realized in said method execution mode is that the hardware that can carry out instruction relevant by program has come, described program can be stored in computer read/write memory medium, here the alleged storage medium obtained, as: ROM/RAM, magnetic disc, CD etc.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (11)
1. an accidental access method, is applied to terminal, it is characterized in that, described method comprises:
The selection threshold value based on the multiple access random access mode of communication signal quality is obtained according to the service quality QoS of destinations traffic business;
Determine the communication signal quality value that described selection threshold value is corresponding;
Judge whether described communication signal quality value is greater than described selection threshold value;
If be greater than, non-orthogonal multiple random access mode is selected to carry out Stochastic accessing;
Otherwise, select orthogonal multiple access random access mode to carry out Stochastic accessing.
2. method according to claim 1, is characterized in that, the described service quality QoS according to destinations traffic business obtains the selection threshold value based on the multiple access random access mode of communication signal quality, comprising:
According to the communication signal quality value preset and the service quality QoS of destinations traffic business, obtain the selection threshold value of multiple access random access mode;
Or
Receive the selection threshold value of the multiple access random access mode that network terminal is sent by broadcast channel or control channel,
Wherein, described selection threshold value is:
Described network terminal, when meeting the service quality QoS requirements preset, obtains according to the performance parameter of described network terminal receiver; Or
Described network terminal, when meeting the service quality QoS requirements of described destinations traffic business, obtains according to the performance parameter of described network terminal receiver.
3. method according to claim 1, is characterized in that, described communication signal quality value is:
Present terminal sends Signal-to-Noise; Or
Present terminal receives information signal to noise ratio.
4. the method according to any one of claim 1-3, is characterized in that, described selection non-orthogonal multiple random access mode carries out Stochastic accessing, comprising:
Determine that present terminal is group switching centre terminal or non-group center terminal, wherein, group switching centre terminal is the terminal sending beacon message in the current Stochastic accessing cycle to described network terminal;
If present terminal is group switching centre terminal, after sending beacon message with broadcast mode, find in remaining pairing the terminal identification information obtaining non-present terminal in resource; According to obtained terminal identification information, select to preset X terminal, set up nonopiate Stochastic accessing group; A targeting sequencing is selected arbitrarily in available targeting sequencing, and with the indication information of targeting sequencing selected by broadcast mode transmission and the terminal identification information of a selected X terminal; By Physical Random Access Channel PRACH to the targeting sequencing selected by described network terminal transmission; Receive the accidental access response that described network terminal is sent by physical down channel;
If present terminal is not group switching centre terminal, after group switching centre terminal transmitting terminal identification information, receive group switching centre terminal with the indication information of targeting sequencing selected by broadcast mode transmission and the terminal identification information of a selected X terminal; According to the terminal identification information of a selected X terminal, judge whether the mark of present terminal belongs to X terminal of described group switching centre terminal selection; If belong to, receive the accidental access response that described network terminal is sent by physical down channel after receiving the targeting sequencing that group switching centre terminal sent by PRACH;
Wherein, at least comprise in described accidental access response: described network terminal be present terminal distribute, for sending the mark P of the Physical Uplink Shared Channel PUSCH of schedule information and/or service data information
iD;
The Uplink Shared Channel PUSCH indicated in described accidental access response sends schedule information and/or service data information to described network terminal;
Receive described network terminal according to the feedback information sent the analysis result of described schedule information and/or service data information.
5. method according to claim 4, is characterized in that, describedly judges whether present terminal is group switching centre terminal, comprising:
Find to determine communication information sending time slots in resource in pairing, wherein, the described communication information is the terminal identification information of beacon message or present terminal;
Before described communication information sending time slots arrives, detect the beacon message that pairing finds whether to have existed in resource the transmission of non-present terminal;
If the beacon message that non-present terminal sends do not detected before described communication information sending time slots arrives, on described communication information sending time slots, send beacon message, and judge that present terminal is as group switching centre terminal;
If the beacon message that non-present terminal sends detected before described communication information sending time slots arrives, on described communication information sending time slots, send the terminal identification information of present terminal, and judge that present terminal is as non-group center terminal.
6. method according to claim 4, is characterized in that, described according to obtained terminal identification information, select to preset X terminal, before setting up nonopiate Stochastic accessing group, also comprises:
According to service quality QoS and the described selection threshold value of described destinations traffic business, determine the maximum number of user n allowing access when adopting non-orthogonal multiple random access mode to carry out Stochastic accessing
nOMA.
7. method according to claim 6, is characterized in that, described according to obtained terminal identification information, selects to preset X terminal, sets up nonopiate Stochastic accessing group, comprising:
According to the degree of closeness order from high to low between the path loss values of each terminal and the path loss values of present terminal, according to obtained terminal identification information, select min (n
nOMA-1, n
f) individual terminal, set up nonopiate Stochastic accessing group, wherein, min () represents minimum parameter choice function, n
frepresent the quantity of the terminal identification information obtained.
8. an accidental access method, is applied to network terminal, it is characterized in that, described method comprises:
Determine to select threshold value, send described selection threshold value to terminal, select the random access mode that will adopt when carrying out Stochastic accessing to make described terminal according to described selection threshold value;
Wherein, described selection threshold value is:
When meeting the service quality QoS requirements preset, obtain according to the performance parameter of network terminal receiver; Or
Network termination when meeting the service quality QoS requirements of described destinations traffic business, obtains according to the performance parameter of described network terminal receiver after receiving the service quality QoS of the destinations traffic business that terminal sends;
According to the random access mode selected by described terminal, carry out Stochastic accessing with described terminal.
9. method according to claim 8, it is characterized in that, when the random access mode selected by described terminal is nonopiate random access mode, described according to the random access mode selected by described terminal, carry out Stochastic accessing with described terminal, comprising:
After receiving the targeting sequencing that group switching centre terminal sent by Physical Random Access Channel PRACH, accidental access response is sent to each terminal in nonopiate Stochastic accessing group by physical down channel, wherein, at least comprise in accidental access response: described network terminal be terminal distribution, for sending the mark P of the Physical Uplink Shared Channel PUSCH of schedule information and/or service data information
iD, described nonopiate Stochastic accessing group is: described group switching centre terminal is set up according to the terminal identification information of the non-group center terminal finding to obtain in resource in pairing;
Receive schedule information and/or service data information that each terminal in described nonopiate Stochastic accessing group sent by the Uplink Shared Channel PUSCH indicated in accidental access response;
Received schedule information and/or service data information are resolved, and the analysis result for each terminal in described nonopiate Stochastic accessing group is fed back to each terminal.
10. an accidental access device, is applied to terminal, it is characterized in that, described device comprises:
Threshold value is selected to obtain module, for obtaining the selection threshold value based on the multiple access random access mode of communication signal quality according to the service quality QoS of destinations traffic business;
Communication signal quality determination module, for determining the communication signal quality value that described selection threshold value is corresponding;
Communication signal quality value judge module, for judging whether described communication signal quality value is greater than described selection threshold value;
First Stochastic accessing module, for when the judged result of described communication signal quality value judge module is for being, selects non-orthogonal multiple random access mode to carry out Stochastic accessing;
Second Stochastic accessing module, for when the judged result of described communication signal quality value judge module is for being, selects orthogonal multiple access random access mode to carry out Stochastic accessing.
11. 1 kinds of accidental access devices, are applied to network terminal, it is characterized in that, described device also comprises:
Select threshold value determination module, for sending described selection threshold value to terminal, select the random access mode that will adopt when carrying out Stochastic accessing according to described selection threshold value to make described terminal;
Wherein, described selection threshold value is:
When meeting the service quality QoS requirements preset, obtain according to the performance parameter of network terminal receiver; Or
Network termination when meeting the service quality QoS requirements of described destinations traffic business, obtains according to the performance parameter of described network terminal receiver after receiving the service quality QoS of the destinations traffic business that terminal sends;
3rd Stochastic accessing module, for according to the random access mode selected by described terminal, carries out Stochastic accessing with described terminal.
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