CN105792362A - Wireless resource allocation method - Google Patents
Wireless resource allocation method Download PDFInfo
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- CN105792362A CN105792362A CN201410828688.2A CN201410828688A CN105792362A CN 105792362 A CN105792362 A CN 105792362A CN 201410828688 A CN201410828688 A CN 201410828688A CN 105792362 A CN105792362 A CN 105792362A
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Abstract
The invention discloses a wireless resource allocation method, in particular to a method for carrying out uplink transmission scheduling in user equipment of an LTE (Long Term Evolution) communication system. The method comprises the following steps that the user equipment receives a first message sent by a base station on an authorized carrier, wherein the first message is used for scheduling the user equipment to carry out uplink transmission on an unauthorized carrier; the user equipment carries out channel sensing on the unauthorized carrier at a moment for reserving the uplink transmission according to scheduling of the first message; and when a result for carrying out channel sensing on the unauthorized carrier shows that a channel is occupied, the user equipment sends a second message to the base station on the authorized carrier, wherein the second message is used for indicating the occupied information of the unauthorized carrier.
Description
Technical field
The present invention relates to communication technical field, particularly relate to wireless communication technology field.
Background technology
At wireless communication field, it is however generally that, traditional deployment way is that system is operated in mandate frequency range (licensedband), and namely whole frequency spectrum resource all keeps for this system to use.Typically, LTE communication system is exactly use authority band operation.
But, along with the further growth of wireless traffic, capacity and band requirement to wireless communication system also improve therewith.In this case, the mandate resource of frequency range of LTE system seems relative deficiency.Therefore, one of nearest in LTE field study hotspot is how that the resource utilizing unauthorized frequency range is to tap data service occurred frequently.This kind of scheme is referred to as subordinate in LTE (LTEinUnlicensedspectrum the is called for short LTE-U) system of unauthorized carrier wave
Such as, under a typical scene, LTE system uses the frequency range of WiFi system.Namely the situation that the community of LTE system and the community of WiFi system coexist at least partly on geographical position.In this case, if LTE system can use the frequency range of WiFi to carry out service distributing in the moment of some high capacity, it is clear that the performance of system can be greatly improved, thus effectively coping with high capacity application scenarios.
Obviously, when LTE coexists with WiFi system, the carrier wave that authorizes utilizing LTE system is that one the most directly selects to assist the unauthorized carrier wave of WiFi system to carry out access, accordingly, with respect to the big focus authorizing auxiliary access (Licensed-AssistedAccess is called for short LAA) to become recent moving communicating field.
The existing procedure that LAA technology can farthest continue to use LTE system is utilized to realize authorizing the carrier aggregation (CarrierAggregation is called for short CA) of carrier wave and unauthorized carrier wave to dispatch, but, consider that the resource on unauthorized carrier wave is not monopolized by this LTE system, therefore will face following problem when carrying out uplink scheduling:
nullWhen the base station of LTE system is the ascending resource that subscriber equipment (UserEquipment is called for short UE) distributes unauthorized carrier wave frequency range，Even if base station is intercepted (listenbeforetalk is called for short LBT) before this unauthorized carrier wave has been carried out transmission by the moment sending uplink authorization (UplinkGrant is called for short ULGrant) and confirms unoccupied at this unauthorized carrier wave at that time，But，Consider on Physical Downlink Control Channel (Physicaldownlinkcontrolchannel is called for short PDCCH), to send uplink authorization from base station，Sharing channel (Physicaluplinksharedchannel is called for short PUSCH) to UE row physically, actual to carry out there is the regular hour between uplink poor (as in typical LTE system，For 4ms).Therefore, when UE be actually subjected to carry out uplink when, this unauthorized carrier wave is likely to occupied, and therefore UE carries out uplink or base station receives upstream data again and become nonsensical again.But, in existing uplink scheduling mechanism, such situation can not be processed, the ascending resource that base station is distributed before cannot learning it becomes unavailable, therefore still can attempt receiving and decoding data carrying out HARQ re-transmission even at decoding further requirement UE after unsuccessfully, thus causing the waste of system resource.
So the target of the present invention is exactly find a kind of new uplink dispatch method；This method is required to so that when LAA, UE can notify the occupied information of the unauthorized carrier wave in base station, so that it is guaranteed that the integrity to unauthorized carrier wave uplink scheduling；Compatible as much as possible existing specification again, it is to avoid the change of existing protocol is excessive.
Summary of the invention
For solving the problems referred to above of the prior art, the present invention proposes a kind of new uplink dispatch method.Base station by allowing UE carry out channel-aware before up transmission, then passes through mandate carrier wave to the occupied information of base station repeats channel, so that it is guaranteed that can determine whether reception data on unauthorized carrier wave.
Specifically, according to the first aspect of the invention, propose a kind of method carrying out uplink scheduling in the subscriber equipment of LTE communication system, including: described subscriber equipment is authorizing the first message that on carrier wave, reception base station sends, wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；Described unauthorized carrier wave, in the scheduling according to described first message, is carried out channel-aware in the moment being scheduled for described uplink by described subscriber equipment；And, when the result that described unauthorized carrier wave is carried out channel-aware be channel occupied time, described subscriber equipment sends the second message to described base station on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
Preferably, wherein, also including after described 3rd step, described subscriber equipment receives the first new message of base station transmission authorizing on carrier wave, and wherein, described the first new message carries out uplink for rescheduling described subscriber equipment on unauthorized carrier wave.
It is highly preferred that also included before above-mentioned steps, described subscriber equipment carries out channel measurement on described unauthorized carrier wave and by described mandate carrier wave, the result of described channel measurement is sent to described base station.
Preferably, wherein, described first message also include for indicating described subscriber equipment periodically to repeat the described information carrying out uplink on unauthorized carrier wave, and, also include after described 3rd step, described subscriber equipment, according to described first message, periodically repeats described first step to second step.
Preferably, wherein, described recurrence interval cycle and/or maximum number of repetitions are at least included for indicating described subscriber equipment periodically to repeat the described information carrying out uplink on unauthorized carrier wave.
It is highly preferred that described first message is uplink authorization.
It is highly preferred that wherein, described subscriber equipment sends described second message by Physical Uplink Shared Channel or Physical Uplink Control Channel.
According to the second aspect of the invention, propose a kind of method carrying out uplink scheduling in the base station of LTE communication system, including: described base station sends the first message to subscriber equipment base station on mandate carrier wave, wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；And, described base station receives the second message that described subscriber equipment sends on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
Preferably, wherein, described base station sends the first new message to described subscriber equipment on described mandate carrier wave, and wherein, described the first new message carries out uplink for rescheduling described subscriber equipment on unauthorized carrier wave.
More preferably, wherein, described first message also include for indicating described subscriber equipment periodically to repeat the described information carrying out uplink on unauthorized carrier wave, described method also includes, the information of uplink is repeated according to described periodicity in described base station, periodically receives the second message that described subscriber equipment sends on described mandate carrier wave.
It is highly preferred that described first message is uplink authorization.
It is highly preferred that wherein, described base station receives described second message by Physical Uplink Shared Channel or Physical Uplink Control Channel
According to the third aspect of the invention we, propose a kind of equipment carrying out uplink scheduling in the subscriber equipment of LTE communication system, including: receiver module, the first message receiving base station transmission on carrier wave is being authorized for described subscriber equipment, wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；Sensing module, for described subscriber equipment in the scheduling according to described first message, carries out channel-aware in the moment being scheduled for described uplink to described unauthorized carrier wave；And, sending module, for when the result that described unauthorized carrier wave is carried out channel-aware be channel occupied time, described subscriber equipment sends the second message to described base station on described mandate carrier wave, wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
According to the fourth aspect of the invention, propose a kind of equipment carrying out uplink scheduling in the base station of LTE communication system, including: sending module, on mandate carrier wave, the first message is sent to subscriber equipment base station for described base station, wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；And, receive mould certainly, on described mandate carrier wave, receive the second message that described subscriber equipment sends for described base station, wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
In the present invention, by allowing UE carry out channel-aware before up transmission, so that it is guaranteed that may determine that the actual of unauthorized carrier wave takies situation；Authorize carrier wave to the occupied information of base station repeats channel by allowing UE pass through, it is ensured that base station is appreciated that unauthorized carrier wave is occupied from without receiving this upstream data again；And without introducing Signalling exchange on unauthorized carrier wave, thus farthest ensure that the versatility of this realization and the compatibility with existing specification.
Accompanying drawing explanation
Reading the following detailed description to non-limiting example by referring to accompanying drawing, the further feature of the present invention, purpose and advantage will become apparent from.
Fig. 1 illustrates the flow chart of a kind of method carrying out uplink scheduling in the subscriber equipment of LTE communication system according to the present invention；
Fig. 2 illustrates the flow chart of a kind of method carrying out uplink scheduling in the base station of LTE communication system according to the present invention；
Fig. 3 illustrates the block diagram of a kind of equipment carrying out uplink scheduling in the subscriber equipment of LTE communication system according to the present invention；
Fig. 4 illustrates the block diagram of a kind of equipment carrying out uplink scheduling in the base station of LTE communication system according to the present invention.
Wherein, same or analogous accompanying drawing labelling represents same or analogous steps characteristic or device/module.
Detailed description of the invention
In the specific descriptions of following preferred embodiment, reference is constituted the accompanying drawing appended by a present invention part.Appended accompanying drawing has been illustrated by way of example and has been capable of specific embodiment.The embodiment of example is not intended as the limit all embodiments according to the present invention.It is appreciated that under the premise not necessarily departing from the scope of the present invention, it is possible to use other embodiments, it is also possible to carry out structural or logicality amendment.Therefore, following specific descriptions are also nonrestrictive, and the scope of the present invention is defined by the claims appended hereto.
First, application according to the present invention scene, there is the region that LTE communication system covers, including at least one base station and UE and contact mandate carrier wave between the two, in this this region external, there is also other unauthorized carrier wave.When this UE is carried out uplink scheduling by base station, it is possible to distributing the resource on this unauthorized carrier wave for this UE, this information is sent to UE by the first authorized carrier wave of message by base station.Obviously, before base station carries out above-mentioned resource distribution, base station can carry out channel-aware on unauthorized carrier wave, confirms unoccupied in the resource of this its distribution of moment.But, when this UE receives the resource allocation information of base station, and be ready on corresponding unauthorized carrier resource uplink time, the occupation condition of unauthorized carrier wave is likely to have occurred that change.Therefore the method according to the invention, UE needs the channel-aware again carrying out on unauthorized carrier wave, it is determined that now above-mentioned the actual of unauthorized carrier resource being assigned with takies situation.Preferably, UE now can carry out once quickly channel-aware operation with simple flow, for instance, only one symbol (Symbol) of detection.
When the above-mentioned unauthorized carrier resource being assigned with is still unoccupied, UE can carry out uplink according to original schedule information on unauthorized carrier wave, and base station also performs to receive action accordingly by former schedule information, this part is identical with existing specification, therefore not in the scope that the present invention discusses.
And when the above-mentioned unauthorized carrier resource being assigned with is occupied, mean that original schedule information is unavailable, UE should not retransmit this uplink, and base station yet should not receive/decode corresponding data again, therefore the method according to the invention, when determining that unauthorized carrier resource is occupied, UE requires over aforesaid mandate carrier wave and sends the second message to base station, for notifying base station, this uplink is occupied thus eliminate due to resource.So, based on the mandate carrier wave existed between base station and UE, base station can learn the occupied situation of above-mentioned unauthorized carrier wave in time, from without reattempting reception/decoding upstream data, it is ensured that overhead is not wasted.It it is more than the basic thought of the present invention.
On this basis, according to one embodiment of present invention, it is proposed that a kind of method carrying out uplink scheduling in the UE of LTE communication system.Concrete:
First this UE is authorizing the first message receiving base station transmission on carrier wave, includes and indicate this UE scheduling message carrying out uplink on unauthorized carrier wave in this message；Typically, this first message is ULgrant.
Second step, in the uplink moment that UE indicates in above-mentioned schedule information, first carries out channel-aware, it is determined that in this moment on unauthorized carrier wave, and whether the resource on above-mentioned unauthorized carrier wave is occupied.
3rd step, if to be the resource on unauthorized carrier wave occupied for the result of channel-aware, then UE is by authorizing carrier wave to send second this result of message informing base station to base station.Such base station just knows this uplink and will not occur, such that it is able to proceed by new uplink scheduling.
Further, UE receives the first new message of base station transmission authorizing on carrier wave, and this first new message indicates once new uplink scheduling.Such UE just can carry out uplink next time according to new schedule information to be attempted.
As preferably, after above-mentioned 3rd step, UE can carry out channel measurement on this unauthorized carrier wave, and the result of measurement is sent to base station.The purpose of do so is when there being when taking/disturb of persistence on unauthorized carrier wave, base station is likely to dispatch for several times all can be failed, therefore channel measurement can be first passed through by UE, it is determined that channel reinforms UE and starts scheduling after the free time, thus reducing the number of times that scheduling is failed.
Similar, on this basis, according to another embodiment of the invention, it is proposed that a kind of method carrying out uplink scheduling in the UE of LTE communication system.Concrete:
First this UE is authorizing the first message receiving base station transmission on carrier wave, includes and indicate this UE scheduling message carrying out uplink on unauthorized carrier wave in this message；Typically, this first message is ULgrant, with previous embodiment the difference is that, this first message further comprises the instruction periodic repeated attempt of this UE and carry out the information of this uplink, the purpose of do so is to reduce base station to carry out the number of times of uplink scheduling.
Preferably, this information includes the recurrence interval cycle, and such base station it is known that when a uplink is unsuccessful, once attempt in which moment wait；And/or maximum number of repetitions, when such base station is it is known that to carry out once new uplink scheduling.
Second step, in the uplink moment that UE indicates in above-mentioned schedule information, first carries out channel-aware, it is determined that in this moment on unauthorized carrier wave, and whether the resource on above-mentioned unauthorized carrier wave is occupied.
3rd step, if to be the resource on unauthorized carrier wave occupied for the result of channel-aware, then UE is by authorizing carrier wave to send second this result of message informing base station to base station.Such base station just knows this uplink and will not occur, such that it is able to proceed by new uplink scheduling.
Further, UE according to repeated attempt information, again attempts to carry out uplink in the moment that next cycle arrives, and namely repeats above-mentioned second step to the 3rd step until uplink success or reached maximum number of repetitions.
As preferably, in the above two embodiments, the first message can be through PDCCH and sends；And the second message, when this UE has the uplink authorizing carrier wave simultaneously, it is possible to sent by PUSCH, otherwise can pass through Physical Uplink Control Channel (Physicaluplinkcontrolchannel is called for short PUCCH).
Accompanying drawing 1 illustrates the flow chart carrying out uplink scheduling according to above-described embodiment, including:
S11. described subscriber equipment is authorizing the first message receiving base station transmission on carrier wave, and wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；
S12. described subscriber equipment is in the scheduling according to described first message, in the moment being scheduled for described uplink, described unauthorized carrier wave is carried out channel-aware；
S13. when the result that described unauthorized carrier wave is carried out channel-aware be channel occupied time, described subscriber equipment sends the second message to described base station on described mandate carrier wave, wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
Corresponding, according to another embodiment of the invention, it is proposed that a kind of method carrying out uplink scheduling in the base station of LTE communication system.Concrete:
First this base station is authorizing on carrier wave to UE the first message sent, and includes and indicate this UE scheduling message carrying out uplink on unauthorized carrier wave in this message；Typically, this first message is ULgrant.
Second step, this base station receives UE the second message sent on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
Preferably, this base station next sending the first new message, can carry out uplink for rescheduling this UE on unauthorized carrier wave.
Or, this first message further comprises the instruction periodic repeated attempt of this UE and carry out the information of this uplink, and, therefore this base station periodically receives UE the second message sent on described mandate carrier wave.
Same, the first message can be through PDCCH and sends；And the second message can be through PUSCH or PUCCH and sends.
Accompanying drawing 2 illustrates the flow chart carrying out resource distribution according to above-described embodiment, including:
S21. described base station sends the first message to subscriber equipment base station on mandate carrier wave, and wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；
S22. described base station receives the second message that described subscriber equipment sends on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
Hereinafter introduce the equipment corresponding with said method provided by the present invention in conjunction with accompanying drawing again, in view of unit/device characteristic therein has corresponding relation with the steps characteristic in said method, will conform to the principle of simplicity.
Accompanying drawing 3 illustrates a kind of equipment 30 carrying out uplink scheduling in the UE of LTE communication system according to the present invention, and described equipment includes:
Receiver module 3001, is authorizing, for described subscriber equipment, the first message receiving base station transmission on carrier wave, and wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；
Sensing module 3002, for described subscriber equipment in the scheduling according to described first message, carries out channel-aware in the moment being scheduled for described uplink to described unauthorized carrier wave；And,
Sending module 3003, for when the result that described unauthorized carrier wave is carried out channel-aware be channel occupied time, described subscriber equipment sends the second message to described base station on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
Accompanying drawing 4 illustrates a kind of equipment 40 carrying out uplink scheduling in the base station of LTE communication system according to the present invention, and described equipment includes:
Sending module 4001, sends first message to subscriber equipment base station for described base station on mandate carrier wave, and wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；And,
Receiver module 4002, receives the second message that described subscriber equipment sends for described base station on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
Above embodiments of the invention being described, but the invention is not limited in specific system, equipment and concrete agreement, those skilled in that art can make various deformation or amendment within the scope of the appended claims.
The those skilled in the art of those the art can pass through to study description, disclosure and accompanying drawing and appending claims, and other of understanding and the enforcement embodiment to disclosing change.In the claims, word " includes " element and the step that are not excluded for other, and wording " one " is not excluded for plural number.In the present invention, " first ", " second " only represent title, do not represent orbution.In the practical application of invention, a part is likely to perform the function of multiple technical characteristics cited in claim.Any accompanying drawing labelling in claim should not be construed as the restriction to scope.
Claims (14)
1. the method carrying out uplink scheduling in the subscriber equipment of LTE communication system, including:
A. described subscriber equipment is authorizing the first message receiving base station transmission on carrier wave, and wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；
B. described subscriber equipment is in the scheduling according to described first message, in the moment being scheduled for described uplink, described unauthorized carrier wave is carried out channel-aware；And,
C. when the result that described unauthorized carrier wave is carried out channel-aware be channel occupied time, described subscriber equipment sends the second message to described base station on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
2. method according to claim 1, wherein, also includes after described step c,
D1. described subscriber equipment is authorizing the first new message receiving base station transmission on carrier wave, and wherein, described the first new message carries out uplink for rescheduling described subscriber equipment on unauthorized carrier wave.
3. method according to claim 2, wherein, also included before described step d1,
D0. described subscriber equipment carries out channel measurement on described unauthorized carrier wave and by described mandate carrier wave, the result of described channel measurement is sent to described base station.
4. method according to claim 1, wherein, also includes in described first message for indicating described subscriber equipment periodically to repeat the described information carrying out uplink on unauthorized carrier wave, and, also include after described step c,
D2. described subscriber equipment is according to described first message, periodically repeats described step b to step c.
5. method according to claim 4, wherein, described at least includes recurrence interval cycle and/or maximum number of repetitions for indicating described subscriber equipment periodically to repeat the described information carrying out uplink on unauthorized carrier wave.
6. the method according to any one of claim 1-5, wherein, described first message is uplink authorization.
7. the method according to any one of claim 1-5, wherein, described subscriber equipment sends described second message by Physical Uplink Shared Channel or Physical Uplink Control Channel.
8. the method carrying out uplink scheduling in the base station of LTE communication system, including:
Described base station sends the first message to subscriber equipment base station on mandate carrier wave, and wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；And,
Described base station receives the second message that described subscriber equipment sends on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
9. method according to claim 8, also includes,
Described base station sends the first new message to described subscriber equipment on described mandate carrier wave, and wherein, described the first new message carries out uplink for rescheduling described subscriber equipment on unauthorized carrier wave.
10. method according to claim 8, wherein, also includes in described first message for indicating described subscriber equipment periodically to repeat the described information carrying out uplink on unauthorized carrier wave, and described method also includes,
The information of uplink is repeated according to described periodicity in described base station, periodically receives the second message that described subscriber equipment sends on described mandate carrier wave.
11. the method according to any one of-10 according to Claim 8, wherein, described first message is uplink authorization.
12. the method according to any one of-10 according to Claim 8, wherein, described base station receives described second message by Physical Uplink Shared Channel or Physical Uplink Control Channel.
13. carry out an equipment for uplink scheduling in the subscriber equipment of LTE communication system, including:
Receiver module, is authorizing, for described subscriber equipment, the first message receiving base station transmission on carrier wave, and wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；
Sensing module, for described subscriber equipment in the scheduling according to described first message, carries out channel-aware in the moment being scheduled for described uplink to described unauthorized carrier wave；And,
Sending module, for when the result that described unauthorized carrier wave is carried out channel-aware be channel occupied time, described subscriber equipment sends the second message to described base station on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
14. carry out an equipment for uplink scheduling in the base station of LTE communication system, including:
Sending module, sends first message to subscriber equipment base station for described base station on mandate carrier wave, and wherein, described first message carries out uplink for dispatching described subscriber equipment on unauthorized carrier wave；And,
Receiver module, receives the second message that described subscriber equipment sends for described base station on described mandate carrier wave, and wherein, described second message is used for indicating the occupied information of described unauthorized carrier wave.
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| CN105792362B (en) | 2019-07-30 |
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