CN105323789A - Resource competition method and device - Google Patents
Resource competition method and device Download PDFInfo
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- CN105323789A CN105323789A CN201410381512.7A CN201410381512A CN105323789A CN 105323789 A CN105323789 A CN 105323789A CN 201410381512 A CN201410381512 A CN 201410381512A CN 105323789 A CN105323789 A CN 105323789A
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Abstract
The invention discloses a resource competition method and device for providing solutions for resource competition. The method comprises the following steps: determining a continuous resource competition failure time, and obtaining the number of preamble sending opportunities corresponding to the determined continuous resource competition failure time according to a corresponding relationship of a preset continuous resource competition failure time and the number of preamble sending opportunities; determining preamble sending opportunities in a sending state and preamble sending opportunities in a non-sending state among the preamble sending opportunities of a competition area according to the obtained number of the preamble sending opportunities; and if other UE is monitored to send a preamble in any preamble sending opportunity in the non-sending state, indicating resource competition failure, and otherwise, indicating resource competition success.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of method and apparatus of resource contention.
Background technology
In traditional cellular telecommunication art, the data communication flow process between two terminals as shown in Figure 1, carry out through base station (ordinary base station or evolved base station) resident separately and core net alternately by the business such as the voice-and-data between two terminals.
Device-to-device (Device-to-Device, D2D) communicate, i.e. terminal direct connection technology, refers to that contiguous terminal (UE) can carry out transfer of data by direct connected link in short range, Centroid (as base station) is not needed to forward, as shown in Figure 2.
D2D communication has following advantage:
1, terminal carrying out direct communication in close range mode can realize higher message transmission rate, lower time delay and lower power consumption;
2, utilize the short distance feature of communication terminal and the D2D communication link extensively distributed in network, effectively can utilize frequency spectrum resource;
3, the local data that the direct communication mode of D2D can adapt to as business such as wireless end-to-end (P2P) shares demand, provides the data, services with flexible adaptation ability;
4, D2D direct communication can utilize substantial amounts in network and widely distributed communication terminal to expand the coverage of network.
The application scenarios of D2D mainly contains following four kinds, and distribute as shown in Fig. 3 a, Fig. 3 b, Fig. 3 c and Fig. 3 d, each scene can combine appearance.UE1 and UE2 in D2D communication can be positioned at network service scope, also can be positioned at outside network coverage, UE1 and UE2 can transmit leg and recipient each other.In the scene shown in Fig. 3 a, UE1 and UE2 is all in outside network coverage; In the scene shown in Fig. 3 b, UE1 is within network coverage, and UE2 is outside network coverage; Shown in Fig. 3 c, UE1 and UE2 is within the coverage of same base station; Shown in Fig. 3 d, UE1 and UE2 is positioned within the coverage of different base station.
In D2D communication, except the One-to-one communication mode between user, typical application scenarios also comprises group or the broadcast communication of D2D, and this scene can be used for fire-fighting in public safety applications, rescue and anti-terrorism etc.
In the existing CarrierSenseMultipleAccesswithCollisionAvoidance based on WiFi system (CSMA/CA) mode, every secondary data all needs competitive resource before sending, once competition will continue to send packet, until Packet Generation completes to resource.The expense that each all competitive resources take is too large, be not suitable for the resource contention of the small data quantity business such as VoIP, and when number of users is more, can lead to a conflict aggravation, causes system performance degradation.Further, in asynchronous communication means, receive UE needs to be in accepting state always, thus knows whether have business to occur, and this will cause the increase of UE power consumption.
Summary of the invention
The invention provides a kind of method and apparatus of resource contention, in order to realize the resource contention of small data quantity business, reduce the expense shared by resource contention, reduce power consumption.
The concrete technical scheme that the embodiment of the present invention provides is as follows:
First aspect, provides a kind of resource competition method, comprising:
Determine the continuous resource competition frequency of failure, according to the corresponding relation between the continuous resource competition frequency of failure preset and the number of lead code preamble send opportunity, obtain the number of competing preamble send opportunity corresponding to the frequency of failure with the described continuous resource determined;
According to the number of the described preamble send opportunity obtained, determine in the preamble send opportunity of competition region, to send the preamble send opportunity of state and the preamble send opportunity of non-sent state;
Preamble is sent in the preamble send opportunity of described transmission state, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, if listened to other UE to send preamble in the preamble send opportunity of any one non-sent state, then resource contention failure, otherwise, resource contention success.
Preferably, along with the increase of the described continuous resource competition frequency of failure in described corresponding relation, the corresponding increase of number of corresponding preamble send opportunity;
The number of the preamble send opportunity corresponding to maximum of the competition of continuous resource described in the described corresponding relation frequency of failure is the sum of the preamble send opportunity that competition region comprises.
Preferably, acquisition is the number of the preamble send opportunity sending state in the preamble send opportunity of described competition region with the number that described continuous resource competes preamble send opportunity corresponding to the frequency of failure.
Preferably, after described resource contention failure, described method also comprises:
Adopt described continuous resource to compete the frequency of failure and set point to sue for peace the result of calculation of gained, upgrade described continuous resource and compete the frequency of failure;
After described resource contention success, described method also comprises:
The described continuous resource competition frequency of failure is updated to default initial value.
Preferably, described preamble send opportunity comprises transmitting portion and processing section;
If described preamble send opportunity is in transmission state,
Described transmitting portion is for sending lead code, and described processing section is the protection interval of the conversion between transmission state and accepting state;
If described preamble send opportunity is in non-sent state,
Described transmitting portion is for receiving lead code, and described processing section is used for judging whether to receive lead code in transmitting portion, and the protection interval for changing between accepting state and transmission state.
Preferably, described preamble send opportunity is made up of an integer OFDM symbol.
Preferably, in the preamble send opportunity of described transmission state, send preamble, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, comprising:
By the subchannel of competition region, in the preamble send opportunity of described transmission state, send preamble, and the described subchannel by competition region, monitor in the preamble send opportunity of non-sent state and whether have other UE to send preamble.
More preferably, after resource contention success, described method also comprises:
According to the corresponding relation between the subchannel in the competition region of presetting and data transmission region sub-channels, determine the subchannel of the subchannel correspondence in data transmission region in the successful described competition region of resource contention.
Second aspect, provides a kind of user equipment (UE), comprising:
Acquiring unit, for determining the continuous resource competition frequency of failure, according to the corresponding relation between the continuous resource competition frequency of failure preset and the number of lead code preamble send opportunity, obtain the number of competing preamble send opportunity corresponding to the frequency of failure with the described continuous resource determined;
Determining unit, for the number of described preamble send opportunity obtained according to described acquiring unit, determines to send the preamble send opportunity of state and the preamble send opportunity of non-sent state in the preamble send opportunity of competition region;
Competitive unit, for sending preamble in the preamble send opportunity of described transmission state, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, if listened to other UE to send preamble in the preamble send opportunity of any one non-sent state, then resource contention failure, otherwise, resource contention success.
Preferably, along with the increase of the described continuous resource competition frequency of failure in described corresponding relation, the corresponding increase of number of corresponding preamble send opportunity;
The number of the preamble send opportunity corresponding to maximum of the competition of continuous resource described in the described corresponding relation frequency of failure is the sum of the preamble send opportunity that competition region comprises.
Preferably, what described acquiring unit obtained is the number of the preamble send opportunity sending state in the preamble send opportunity of described competition region with the number that described continuous resource competes preamble send opportunity corresponding to the frequency of failure.
Preferably, also comprise updating block, for:
After the failure of described resource contention, adopt described continuous resource to compete the frequency of failure and set point and to sue for peace the result of calculation of gained, upgrade described continuous resource and compete the frequency of failure;
After described resource contention success, the described continuous resource competition frequency of failure is updated to default initial value.
Preferably, described preamble send opportunity comprises transmitting portion and processing section;
If described preamble send opportunity is in transmission state,
Described transmitting portion is for sending lead code, and described processing section is the protection interval of the conversion between transmission state and accepting state;
If described preamble send opportunity is in non-sent state,
Described transmitting portion is for receiving lead code, and described processing section is used for judging whether to receive lead code in transmitting portion, and the protection interval for changing between accepting state and transmission state.
Preferably, described preamble send opportunity is made up of an integer OFDM symbol.
Preferably, described competitive unit specifically for:
By the subchannel of competition region, in the preamble send opportunity of described transmission state, send preamble, and the described subchannel by competition region, monitor in the preamble send opportunity of non-sent state and whether have other UE to send preamble.
More preferably, described competitive unit also for:
After resource contention success, according to the corresponding relation between the subchannel in the competition region of presetting and data transmission region sub-channels, determine the subchannel of the subchannel correspondence in data transmission region in the successful described competition region of resource contention.
Based on technique scheme, in the embodiment of the present invention, UE is according to the corresponding relation between the continuous resource competition frequency of failure preset and the number of preamble send opportunity, obtain the number of preamble send opportunity corresponding to the continuous resource competition frequency of failure, according to the number of the preamble send opportunity obtained, determine in the preamble send opportunity of competition region, to send the preamble send opportunity of state and the preamble send opportunity of non-sent state, preamble is sent in the preamble send opportunity of the state of transmission, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, if listened to other UE to send preamble in the preamble send opportunity of any one non-sent state, then resource contention failure, otherwise, resource contention success.Make UE adaptive control can send the number of preamble send opportunity of state, by the method competitive resource of simple energy measuring or sequence coherent detection, the detection complexity of UE is lower, access probability is higher, control access delay by the number controlling the preamble send opportunity of transmission state, and only need carry out resource contention in competition region, reduce the expense shared by resource contention, reduce power consumption, be applicable to the resource contention of small data quantity business.
Accompanying drawing explanation
Fig. 1 is existing cellular communication schematic diagram;
Fig. 2 is existing D2D communication scheme;
Fig. 3 a is existing D2D communications applications scene schematic diagram;
Fig. 3 b is another D2D communications applications scene schematic diagram existing;
Fig. 3 c is another D2D communications applications scene schematic diagram existing;
Fig. 3 d is another D2D communications applications scene schematic diagram existing;
Fig. 4 is D2D communication resource spatial structure schematic diagram in the embodiment of the present invention;
Fig. 5 is the process schematic of UE competitive resource in D2D communication in the embodiment of the present invention;
Fig. 6 is the relation schematic diagram of the preamble number of the competition frequency of failure and the state of transmission continuously in the embodiment of the present invention;
Fig. 7 is resource contention schematic diagram in the embodiment of the present invention;
Fig. 8 is preamble send opportunity structural representation in the embodiment of the present invention;
Fig. 9 is the subchannel corresponding relation schematic diagram of competition region and data transmission region in the embodiment of the present invention;
Figure 10 is UE structural representation in the embodiment of the present invention;
Figure 11 is another UE structural representation in the embodiment of the present invention.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and 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 other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
In D2D communication resource pond, time domain comprises competition region and data transmission region, as shown in Figure 4, competition region and data transmission region are repeated according to some cycles.Wherein, competition region is used for the resource that UE competes data transmission region.
In the embodiment of the present invention, lead code (preamble) send opportunity is the base unit that competition region divides according to time-domain resource.
In the embodiment of the present invention, as shown in Figure 5, in D2D communication, between UE, the detailed process of competitive resource is as follows:
Step 501:UE determines the continuous resource competition frequency of failure, according to the corresponding relation between the continuous resource competition frequency of failure preset and the number of preamble send opportunity, obtain the number of competing preamble send opportunity corresponding to the frequency of failure with this continuous resource determined.
Wherein, the continuous resource competition frequency of failure is defined as UE and participates in resource contention continuously and all compete failed number of times, once the success of UE resource contention, then the continuous resource competition frequency of failure is set to initial value, such as null value.
Preferably, along with the increase of the continuous resource competition frequency of failure in this corresponding relation, the corresponding increase of number of corresponding preamble send opportunity, to improve the probability that UE competes resource.
Preferably, in this corresponding relation, the number of the preamble send opportunity that the maximum of the continuous resource competition frequency of failure is corresponding, is the sum of the preamble send opportunity that competition region comprises.
Wherein, the maximum of the continuous resource competition frequency of failure is determined according to the maximum access delay of UE and the cycle of competition region, also can rule of thumb preset.
Such as, the maximum delay of VoIP business is 200 milliseconds (ms), and the cycle of competition is 40ms, and so UE needs must compete resource within 200/40=5 time.From this angle, its maximum can be 5.Certainly when system in order to reduce the time delay of access, maximum is the number be less than in 5, such as, can be 3.
In concrete enforcement, as shown in Figure 6, UE is when participating in resource contention first, and the number being in the preamble send opportunity of transmission state in competition region is initial value N
1.Competing unsuccessfully, the number being in the preamble send opportunity of transmission state in competition region is N
2, N
2>N
1.The UE continuous resource competition frequency of failure often increases once, be then in the corresponding increase of number of the preamble send opportunity of transmission state in competition region.UE participates in resource contention i-th time, and when front (i-1) secondary resource contention is all failed, the number being in the preamble send opportunity of transmission state in competition region is N
i; The secondary participation resource contention of UE (i+1), and when front i resource contention is all failed, the number being in the preamble send opportunity of transmission state in competition region is N
i+1, and N
i+1>N
i.
Preferably, the UE continuous resource competition frequency of failure often increases once, and the number being in the preamble send opportunity of transmission state in competition region increases fixed value (such as 1,2 etc. positive integer).
When the UE continuous resource competition frequency of failure reaches the maximum of setting, in competition region, each preamble send opportunity is all in transmission state, and to avoid UE cannot compete resource for a long time, a certain UE during D2D is communicated cannot send data all the time.
In the embodiment of the present invention, definition UE participate in resource contention i-th time and before continuously (i-1) secondary equal resource contention failure, if this resource contention failure of UE, then the number of times that UE participates in resource contention increases by 1, and the continuous resource competition frequency of failure also adds 1; If this resource contention success of UE, then number of times UE being participated in resource contention resets, and namely this UE is when participating in resource contention next time, and its number of times participating in resource contention is 1 (participating in resource contention the 1st time), and the continuous resource competition frequency of failure is zero.
Step 502: according to the number of the preamble send opportunity obtained, determine to send the preamble send opportunity of state and the preamble send opportunity of non-sent state in the preamble send opportunity of competition region.
Preferably, the number of the preamble send opportunity obtained in step 501 is the number of the preamble send opportunity sending state in the preamble send opportunity of competition region.
In practical application, also can using the number of the number of the preamble send opportunity of acquisition in step 501 as the preamble send opportunity of non-sent state in the preamble send opportunity of competition region, now, along with the increase of the continuous resource competition frequency of failure in corresponding relation, the number of the preamble send opportunity of the corresponding non-sent state preset reduces, when the continuous resource competition frequency of failure in corresponding relation reaches maximum, the number of the preamble send opportunity of the corresponding non-sent state preset is zero.
Particularly, the preamble send opportunity corresponding to the number of the preamble send opportunity that step 501 obtains is selected from the preamble send opportunity of competition region, the preamble send opportunity of selection is defined as the preamble send opportunity of transmission state, the send opportunity in the preamble send opportunity of this competition region except the preamble send opportunity of this transmission state is defined as the preamble send opportunity of non-sent state.
In practical application; according to the number of the preamble send opportunity obtained; determine that the mode sending the preamble send opportunity of state and the preamble send opportunity of non-sent state in the preamble send opportunity of competition region is not limited to this; can also have multiple implementation, protection scope of the present invention is not as limit.
Such as, according to the number of the preamble send opportunity obtained, calculated by the computation rule preset, determine the number of the preamble send opportunity sending state in one group of preamble send opportunity according to this result of calculation.
Wherein, the preamble send opportunity sending state is in ON state, in order to send lead code; The send opportunity of non-sent state is in OFF state, in order to mourn in silence or monitor other UE send lead code.
Step 503: send preamble in the preamble send opportunity of the state of transmission, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, if listened to other UE to send preamble in the preamble send opportunity of any one non-sent state, then resource contention failure, otherwise, resource contention success.
Preferably, each preamble send opportunity in the preamble send opportunity of competition region is processed successively:
If described preamble send opportunity is transmission state, in described preamble send opportunity, send preamble;
If described preamble send opportunity is non-sent state, monitor in described preamble send opportunity and whether have other UE to send preamble, if listened to other UE to send preamble, resource contention failure, otherwise, continue next preamble send opportunity of process;
Until when all not hearing other UE transmission preamble in the preamble send opportunity of each non-sent state, resource contention success.
Preferably, after resource contention failure, adopt the result of calculation of continuous resource the competition frequency of failure and the set point gained of suing for peace such as (such as 1 positive integer), upgrading continuous resource competes the frequency of failure;
After resource contention success, continuous resource is competed the frequency of failure and be updated to default initial value.
In concrete enforcement, the number of the preamble send opportunity that UE obtains according to step 501, suppose to represent with N, as the number of the preamble send opportunity of the transmission state in the preamble send opportunity of competition region, the number of the total preamble send opportunity comprised in the preamble send opportunity of this competition region represents with M, then M is more than or equal to N.
This selects N number of preamble send opportunity by randomization selection mode, the preamble send opportunity chosen is designated as ON in specifically implementing in the preamble send opportunity of competition region, sends preamble in order to UE; Not selected preamble send opportunity is designated as OFF, and in this not selected preamble send opportunity, UE is in and mourns in silence or listening state.Then the number of the combination of ON/OFF in preamble send opportunity in competition region can be expressed as:
Such as, as shown in Figure 7, the mode that UE1 combines according to the preamble send opportunity ON/OFF of a Stochastic choice in competition region sends preamble, in order to compete the resource in data transmission region.Whether UE1 sends preamble in the preamble send opportunity of ON, and in the preamble send opportunity of OFF, UE1 is in silent status, have other UE to send preamble for monitoring in subchannel corresponding to current preamble send opportunity.
If find that other UE (as UE2) sends preamble in current preamble send opportunity, then UE1 stops in preamble send opportunity follow-up in current competitive region and sends preamble, i.e. UE1 resource contention failure, then UE1 upper once participate in resource contention time, it participates in number of times of resource contention and resets to initial value 1.
If find no other UE to send preamble in current preamble send opportunity, the mode then combined according to the ON/OFF of this Stochastic choice continues next preamble send opportunity, until last preamble send opportunity is disposed, the success of UE1 resource contention can be determined.
In a specific embodiment, the preamble send opportunity of definition competition region comprises 8 preamble send opportunity, and the maximum times that definition participates in resource contention is 3, namely the failed number of times of continuous resource competition is 2 to the maximum, the number being initially in the preamble send opportunity of transmission state is 4, during each resource contention failure, the number sending the preamble send opportunity of state increases by 2.
UE is when participating in resource contention first, and the number being in the preamble send opportunity of transmission state is 4, Qi Zhongyou
the mode of individual ON/OFF combination, UE Stochastic choice in these 70 ON/OFF combinations is a kind of, and carries out resource contention according to the ON/OFF compound mode selected.
UE is after resource contention failure first, and when second time participates in resource contention, the number being in the preamble send opportunity of transmission state is 6, Qi Zhongyou
the mode of individual ON/OFF combination, UE Stochastic choice in these 28 ON/OFF combinations is a kind of, and carries out resource contention according to the ON/OFF compound mode selected.
UE is after the failure of second time resource contention, third time is when participating in resource contention, the number being in the preamble send opportunity of transmission state is 8, each preamble send opportunity in the preamble send opportunity of i.e. competition region is all in transmission state, now only has a kind of ON/OFF compound mode.
Preferably, a preamble send opportunity comprises transmitting portion and processing section.
Particularly, if preamble send opportunity is in transmission state, transmitting portion is for sending lead code, and processing section is the protection interval of the conversion between transmission state and accepting state;
If preamble send opportunity is in non-sent state, transmitting portion is for receiving lead code, and processing section is used for judging whether to receive lead code in transmitting portion, and the protection interval of changing between accepting state and transmission state.
Wherein, processing section is also referred to as protection interval (GP).In concrete enforcement, as shown in Figure 8, before the transmitting portion in a preamble send opportunity is positioned at protection interval; Or, after the transmitting portion in a preamble send opportunity is positioned at protection interval; Or protection interval is made up of two son protection intervals, and the transmitting portion in a preamble send opportunity is between two son protection intervals.
Preferably, preamble send opportunity is made up of an integer OFDM (OFDM) symbol.
Such as, suppose that the length of GP is 1 OFDM symbol, then the length of a preamble send opportunity is 2 OFDM symbol, and one group of preamble send opportunity can adopt the mode of the DMRS sequence be similar in PUSCH.
Again such as, suppose that the length of a preamble send opportunity is 1 OFDM symbol, the length of GP is half OFDM symbol, then one group of preamble send opportunity can adopt the mode being similar to SRS, is fixed as even subcarriers or is fixed as odd subcarriers.
Preferably, competition region is divided into multiple subchannel, and data transmission region is also divided into multiple subchannel, and the subchannel one_to_one corresponding of the sub-information and date transmission region in competition region, as shown in Figure 9.Now, the corresponding one group of preamble send opportunity of the every sub-channels in competition region.
This is preferably in execution mode, by this subchannel of competition region, in the preamble send opportunity of the state of transmission, send preamble, and the subchannel by competition region, monitor in the preamble send opportunity in non-sent state and whether have other UE to send preamble.
If listened to the preamble of other UE transmission in the preamble send opportunity of arbitrary non-sent state by this subchannel of competition region, then resource contention failure; If all do not heard the preamble of other UE transmission in the preamble send opportunity of each non-sent state by this subchannel of competition region, then resource contention success.
This is preferably in execution mode, after resource contention success, according to the corresponding relation between the subchannel of competition region preset and data transmission region sub-channels, determine the subchannel that this subchannel of the successful competition region of resource contention is corresponding in data transmission region.
This is preferably in execution mode, and competition region is divided into multiple subchannel, and the resource contention in each subchannel independently carries out, and can realize narrow band transmission.
Such as, as shown in Figure 9, UE1 determines the continuous resource competition frequency of failure in competition region, according to the corresponding relation between the continuous resource competition frequency of failure preset and the number of lead code preamble send opportunity, obtain the number of competing preamble send opportunity corresponding to the frequency of failure with this continuous resource determined.Suppose to participate in resource contention in the current subchannel 1 in competition region of UE1, according to the number of the preamble send opportunity obtained, determine in the preamble send opportunity of the subchannel 1 of competition region, to send the preamble send opportunity of state and the preamble send opportunity of non-sent state; By the subchannel 1 of competition region, in the preamble send opportunity of the state of transmission, send preamble, and the subchannel 1 by competition region, monitor in the preamble send opportunity in non-sent state and whether have other UE to send preamble.
Based on identical inventive concept, additionally provide a kind of UE in the embodiment of the present invention, the concrete enforcement of this UE can see the description of said method part, and repeat part and repeat no more, as shown in Figure 10, this UE mainly comprises:
Acquiring unit 1001, for determining the continuous resource competition frequency of failure, according to the corresponding relation between the continuous resource competition frequency of failure preset and the number of lead code preamble send opportunity, obtain the number of competing preamble send opportunity corresponding to the frequency of failure with the described continuous resource determined;
Determining unit 1002, for the number of described preamble send opportunity obtained according to acquiring unit 1001, determines to send the preamble send opportunity of state and the preamble send opportunity of non-sent state in the preamble send opportunity of competition region;
Competitive unit 1003, for sending preamble in the preamble send opportunity of described transmission state, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, if listened to other UE to send preamble in the preamble send opportunity of any one non-sent state, then resource contention failure, otherwise, resource contention success.
Preferably, along with the increase of the described continuous resource competition frequency of failure in described corresponding relation, the corresponding increase of number of corresponding preamble send opportunity;
In this corresponding relation, the number of the preamble send opportunity that the maximum of the continuous resource competition frequency of failure is corresponding, is the sum of the preamble send opportunity that competition region comprises.
Preferentially, what acquiring unit obtained is the number of the preamble send opportunity sending state in the preamble send opportunity of described competition region with the number that described continuous resource competes preamble send opportunity corresponding to the frequency of failure.
Determining unit specifically for:
The preamble send opportunity corresponding to the number of the described preamble send opportunity obtained is selected from one group of preamble send opportunity, the described preamble send opportunity selected is defined as the preamble send opportunity of transmission state, the send opportunity in described one group of preamble send opportunity except the preamble send opportunity of described transmission state is defined as the preamble send opportunity of non-sent state.
Preferably, competitive unit specifically for:
Process each preamble send opportunity in described one group of preamble send opportunity successively:
If described preamble send opportunity is transmission state, in described preamble send opportunity, send preamble;
If described preamble send opportunity is non-sent state, monitor in described preamble send opportunity and whether have other UE to send preamble, if listened to other UE to send preamble, resource contention failure, otherwise, continue next preamble send opportunity of process;
Until when all not hearing other UE transmission preamble in the preamble send opportunity of each non-sent state, resource contention success.
Preferably, also comprise updating block 1004, for:
After the failure of described resource contention, adopt described continuous resource to compete the frequency of failure and set point and to sue for peace the result of calculation of gained, upgrade described continuous resource and compete the frequency of failure;
After described resource contention success, the described continuous resource competition frequency of failure is updated to default initial value.
Preferably, preamble send opportunity comprises transmitting portion and processing section;
If described preamble send opportunity is in transmission state,
Described transmitting portion is for sending lead code, and described processing section is the protection interval of the conversion between transmission state and accepting state;
If described preamble send opportunity is in non-sent state,
Described transmitting portion is for receiving lead code, and described processing section is used for judging whether to receive lead code in transmitting portion, and the protection interval for changing between accepting state and transmission state.
Preferably, described preamble send opportunity is made up of an integer OFDM symbol.
Preferably, described competitive unit 1003 specifically for:
By the described subchannel of competition region, in the preamble send opportunity of described transmission state, send preamble, and the described described subchannel by competition region, monitor in the preamble send opportunity in non-sent state and whether have other UE to send preamble.
This is preferably in execution mode, competitive unit 1003 also for:
After resource contention success, according to the corresponding relation between the subchannel in the competition region of presetting and data transmission region sub-channels, determine the subchannel of the subchannel correspondence in data transmission region in the successful described competition region of resource contention.
Based on same inventive concept, additionally provide another kind of UE in the embodiment of the present invention, in D2D communication, the concrete enforcement of this UE can see the description of said method part, and repeat part and repeat no more, as shown in figure 11, this UE mainly comprises:
Memory 1101, for preserving the corresponding relation between the default continuous resource competition frequency of failure and the number of lead code preamble send opportunity, and this UE continuous resource competition frequency of failure;
Processor 1102, for obtaining the continuous resource competition frequency of failure from memory, corresponding relation between the continuous resource the preset competition frequency of failure of preserving according to memory and the number of lead code preamble send opportunity, obtains the number of competing preamble send opportunity corresponding to the frequency of failure with the described continuous resource obtained; According to the number of the described preamble send opportunity obtained, determine in the preamble send opportunity of competition region, to send the preamble send opportunity of state and the preamble send opportunity of non-sent state;
Transceiver 1103, for sending preamble in the preamble send opportunity of described transmission state, and monitors whether there is other UE transmission preamble in the preamble send opportunity of non-sent state; If listened to other UE to send preamble in the preamble send opportunity of any one non-sent state, resource contention failure determined by processor 1102, otherwise resource contention success determined by processor 1102.
Preferably, in this corresponding relation preserved in memory 1101, along with the increase of the described continuous resource competition frequency of failure, the corresponding increase of number of corresponding preamble send opportunity; The number of the preamble send opportunity corresponding to maximum of the continuous resource competition frequency of failure is the sum of the preamble send opportunity that competition region comprises.
Preferably, what processor 1102 obtained is the number of the preamble send opportunity sending state in the preamble send opportunity of described competition region with the number that described continuous resource competes preamble send opportunity corresponding to the frequency of failure.
Particularly, processor 1102 selects the preamble send opportunity corresponding to the number of the described preamble send opportunity obtained from the preamble send opportunity of competition region, the described preamble send opportunity selected is defined as the preamble send opportunity of transmission state, the send opportunity in described one group of preamble send opportunity except the preamble send opportunity of described transmission state is defined as the preamble send opportunity of non-sent state.
Preferably, transceiver 1103 processes each preamble send opportunity in the preamble send opportunity of described competition region successively:
If described preamble send opportunity is transmission state, in described preamble send opportunity, send preamble;
If described preamble send opportunity is non-sent state, monitor in described preamble send opportunity and whether have other UE to send preamble, if listened to other UE to send preamble, resource contention failure, otherwise, continue next preamble send opportunity of process;
Until when all not hearing other UE transmission preamble in the preamble send opportunity of each non-sent state, resource contention success.
Preferably, after the failure of processor determination resource contention, adopt continuous resource the competition frequency of failure and set point to sue for peace the result of calculation of gained, the continuous resource of this UE more preserved in new memory competes the frequency of failure;
After the success of processor determination resource contention, the continuous resource of this UE preserved in the memory competition frequency of failure is updated to default initial value.
Preferably, preamble send opportunity comprises transmitting portion and processing section;
If described preamble send opportunity is transmission state,
Described transmitting portion is for sending lead code, and described processing section is the protection interval of the conversion between transmission state and accepting state;
If described preamble send opportunity is non-sent state,
Described transmitting portion is for receiving lead code, and described processing section is used for judging whether to receive lead code in transmitting portion, and the protection interval for changing between accepting state and transmission state.
Preferably, preamble send opportunity is made up of an integer OFDM symbol.
Preferably, if described competition region comprises multiple subchannel, the subchannel in described competition region and the subchannel one_to_one corresponding in data transmission region;
Transceiver 1103 by the subchannel in competition region, send preamble in the preamble send opportunity of described transmission state, and by the subchannel in competition region, monitor in the preamble send opportunity of non-sent state and whether have other UE to send preamble.
Preferably, the corresponding relation between subchannel in default competition region and data transmission region sub-channels is also preserved in memory 1101;
After the success of processor determination resource contention, according to the corresponding relation between the subchannel in this competition region of presetting of preserving in memory and data transmission region sub-channels, determine the subchannel of the subchannel correspondence in data transmission region in the successful described competition region of resource contention.
Based on technique scheme, in the embodiment of the present invention, UE is according to the corresponding relation between the continuous resource competition frequency of failure preset and the number of preamble send opportunity, obtain the number of preamble send opportunity corresponding to the continuous resource competition frequency of failure, according to the number of the preamble send opportunity obtained, determine in one group of preamble send opportunity, to send the preamble send opportunity of state and the preamble send opportunity of non-sent state, preamble is sent in the preamble send opportunity of the state of transmission, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, if listened to other UE to send preamble in the preamble send opportunity of any one non-sent state, then resource contention failure, otherwise, resource contention success.Make UE adaptive control can send the number of preamble send opportunity of state, by the method competitive resource of simple energy measuring or sequence coherent detection, the detection complexity of UE is lower, access probability is higher, access delay is lower, reduce the expense shared by resource contention, be applicable to the resource contention of small data quantity business.
In the embodiment of the present invention, without the need to each competitive resource before data transmission, decrease the expense of resource contention, avoid number of users more time service conflict aggravation situation, avoid the deterioration of systematic function.Further, narrow band transmission mode is applicable to.Meanwhile, avoid in asynchronous communication mode, receive UE and be in accepting state to know the power consumption whether having business that the UE increased occurs always.
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 and 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.
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 (16)
1. a method for resource contention, is characterized in that, comprising:
Determine the continuous resource competition frequency of failure, according to the corresponding relation between the continuous resource competition frequency of failure preset and the number of lead code preamble send opportunity, obtain the number of competing preamble send opportunity corresponding to the frequency of failure with the described continuous resource determined;
According to the number of the described preamble send opportunity obtained, determine in the preamble send opportunity of competition region, to send the preamble send opportunity of state and the preamble send opportunity of non-sent state;
Preamble is sent in the preamble send opportunity of described transmission state, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, if listened to other UE to send preamble in the preamble send opportunity of any one non-sent state, then resource contention failure, otherwise, resource contention success.
2. the method for claim 1, is characterized in that, along with the increase of the described continuous resource competition frequency of failure in described corresponding relation, and the corresponding increase of number of corresponding preamble send opportunity;
The number of the preamble send opportunity corresponding to maximum of the competition of continuous resource described in the described corresponding relation frequency of failure is the sum of the preamble send opportunity that competition region comprises.
3. the method for claim 1, it is characterized in that, acquisition be the number of the preamble send opportunity sending state in the preamble send opportunity of described competition region with the number that described continuous resource competes preamble send opportunity corresponding to the frequency of failure.
4. the method as described in any one of claim 1-3, is characterized in that, after described resource contention failure, described method also comprises:
Adopt described continuous resource to compete the frequency of failure and set point to sue for peace the result of calculation of gained, upgrade described continuous resource and compete the frequency of failure;
After described resource contention success, described method also comprises:
The described continuous resource competition frequency of failure is updated to default initial value.
5. the method as described in any one of claim 1-3, is characterized in that, described preamble send opportunity comprises transmitting portion and processing section;
If described preamble send opportunity is in transmission state,
Described transmitting portion is for sending lead code, and described processing section is the protection interval of the conversion between transmission state and accepting state;
If described preamble send opportunity is in non-sent state,
Described transmitting portion is for receiving lead code, and described processing section is used for judging whether to receive lead code in transmitting portion, and the protection interval for changing between accepting state and transmission state.
6. the method as described in any one of claim 1-3, is characterized in that, described preamble send opportunity is made up of an integer OFDM symbol.
7. the method as described in any one of claim 1-3, it is characterized in that, in the preamble send opportunity of described transmission state, send preamble, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, comprising:
By the subchannel of competition region, in the preamble send opportunity of described transmission state, send preamble, and the described subchannel by competition region, monitor in the preamble send opportunity of non-sent state and whether have other UE to send preamble.
8. method as claimed in claim 7, is characterized in that, after resource contention success, described method also comprises:
According to the corresponding relation between the subchannel in the competition region of presetting and data transmission region sub-channels, determine the subchannel of the subchannel correspondence in data transmission region in the successful described competition region of resource contention.
9. a user equipment (UE), is characterized in that, comprising:
Acquiring unit, for determining the continuous resource competition frequency of failure, according to the corresponding relation between the continuous resource competition frequency of failure preset and the number of lead code preamble send opportunity, obtain the number of competing preamble send opportunity corresponding to the frequency of failure with the described continuous resource determined;
Determining unit, for the number of described preamble send opportunity obtained according to described acquiring unit, determines to send the preamble send opportunity of state and the preamble send opportunity of non-sent state in the preamble send opportunity of competition region;
Competitive unit, for sending preamble in the preamble send opportunity of described transmission state, and in the preamble send opportunity of non-sent state, monitor whether there is other UE transmission preamble, if listened to other UE to send preamble in the preamble send opportunity of any one non-sent state, then resource contention failure, otherwise, resource contention success.
10. UE as claimed in claim 9, is characterized in that, along with the increase of the described continuous resource competition frequency of failure in described corresponding relation, and the corresponding increase of number of corresponding preamble send opportunity;
The number of the preamble send opportunity corresponding to maximum of the competition of continuous resource described in the described corresponding relation frequency of failure is the sum of the preamble send opportunity that competition region comprises.
11. UE as claimed in claim 9, it is characterized in that, what described acquiring unit obtained is the number of the preamble send opportunity sending state in the preamble send opportunity of described competition region with the number that described continuous resource competes preamble send opportunity corresponding to the frequency of failure.
12. UE as described in any one of claim 9-11, is characterized in that, also comprise updating block, for:
After the failure of described resource contention, adopt described continuous resource to compete the frequency of failure and set point and to sue for peace the result of calculation of gained, upgrade described continuous resource and compete the frequency of failure;
After described resource contention success, the described continuous resource competition frequency of failure is updated to default initial value.
13. UE as described in any one of claim 9-11, it is characterized in that, described preamble send opportunity comprises transmitting portion and processing section;
If described preamble send opportunity is in transmission state,
Described transmitting portion is for sending lead code, and described processing section is the protection interval of the conversion between transmission state and accepting state;
If described preamble send opportunity is in non-sent state,
Described transmitting portion is for receiving lead code, and described processing section is used for judging whether to receive lead code in transmitting portion, and the protection interval for changing between accepting state and transmission state.
14. UE as described in any one of claim 9-11, it is characterized in that, described preamble send opportunity is made up of an integer OFDM symbol.
15. UE as described in any one of claim 9-11, is characterized in that, described competitive unit specifically for:
By the subchannel of competition region, in the preamble send opportunity of described transmission state, send preamble, and the described subchannel by competition region, monitor in the preamble send opportunity of non-sent state and whether have other UE to send preamble.
16. UE as claimed in claim 15, is characterized in that, described competitive unit also for:
After resource contention success, according to the corresponding relation between the subchannel in the competition region of presetting and data transmission region sub-channels, determine the subchannel of the subchannel correspondence in data transmission region in the successful described competition region of resource contention.
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| CN201410381512.7A CN105323789B (en) | 2014-08-05 | 2014-08-05 | A kind of method and apparatus of resource contention |
| PCT/CN2015/086038 WO2016019854A1 (en) | 2014-08-05 | 2015-08-04 | Resource contention method and device |
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| CN201410381512.7A CN105323789B (en) | 2014-08-05 | 2014-08-05 | A kind of method and apparatus of resource contention |
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|---|---|---|---|---|
| CN103229582A (en) * | 2012-12-24 | 2013-07-31 | 华为技术有限公司 | Method for resource competition, and method and device for utilization of resource competition |
| CN103281750A (en) * | 2013-05-31 | 2013-09-04 | 北京航空航天大学 | Cooperation multiple access method and system for guaranteeing service quality and fairness |
| US20130301541A1 (en) * | 2012-05-11 | 2013-11-14 | Research In Motion Limited | Method and system for partitioning contention based resources in a wireless network |
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| CN102387538B (en) * | 2010-09-02 | 2015-06-10 | 中兴通讯股份有限公司 | Resource competition method and station |
| CN103200627B (en) * | 2012-01-04 | 2018-05-11 | 中兴通讯股份有限公司 | The method and mobile terminal of conflict are re-established in a kind of solution handoff procedure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130301541A1 (en) * | 2012-05-11 | 2013-11-14 | Research In Motion Limited | Method and system for partitioning contention based resources in a wireless network |
| CN103229582A (en) * | 2012-12-24 | 2013-07-31 | 华为技术有限公司 | Method for resource competition, and method and device for utilization of resource competition |
| CN103281750A (en) * | 2013-05-31 | 2013-09-04 | 北京航空航天大学 | Cooperation multiple access method and system for guaranteeing service quality and fairness |
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