CN105657854A - Uplink access method, device and base station in LTE (Long Term Evolution) system - Google Patents
Uplink access method, device and base station in LTE (Long Term Evolution) system Download PDFInfo
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- CN105657854A CN105657854A CN201510993270.1A CN201510993270A CN105657854A CN 105657854 A CN105657854 A CN 105657854A CN 201510993270 A CN201510993270 A CN 201510993270A CN 105657854 A CN105657854 A CN 105657854A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/006—Synchronisation arrangements determining timing error of reception due to propagation delay using known positions of transmitter and receiver
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Abstract
The embodiment of the invention discloses an uplink access method in an LTE system. The method comprises that a base station uses multi-level sampling windows to respectively receive the PRACHs from UE in different coverage ranges, wherein the levels of the multi-level sampling windows are increased along with the stepped increase of the maximum coverage radius of the base station; after the base station carries out PRACH detection to the PRACHs, the time advance TA of the UE sending the PRACHs is determined; and the base station sends the TA to the UE so that the UE can adjust the uplink transmitting time according to the TA. According to the method, the device and the base station provided by the invention, leveled sampling is carried out to the UE in different distance ranges by using the multi-level sampling windows; the uplink access of the UE in the LTE system with distance more than 100km away from the base station can be realized; therefore, the base station can support farer coverage distance; and the network layout cost can be reduced.
Description
Technical field
The present invention relates to LTE communication technical field, up-link access method, device and the base station being specifically related in a kind of LTE system.
Background technology
LTE (LongTermEvolution, long-term evolution) it is by 3GPP (The3rdGenerationPartnershipProject, third generation affiliate plans) the long-term evolution of UMTS (UniversalMobileTelecommunicationsSystem, universal mobile communication system) technological standard organized to set up.
According to 3GPP agreement, the coverage distance the farthest away that the physical accidental access channel PRACH of standard LTE design can support is 100km. And under some especially big scope or overlength distance scene, such as virgin forest monitoring, sea shipping or drilling unit covering etc., it is necessary to base station can support that farther coverage distance is to reduce cost of arranging net.
Summary of the invention
In view of this, the present invention provides the up-link access method in a kind of LTE system, device and system, it is achieved that base station is greater than the coverage distance of 100km.
Embodiments providing the up-link access method in a kind of LTE system, described method comprises:
Base station uses multistage sample window, receives the physical accidental access channel PRACH of the terminal UE from Cover treatment scope respectively, and wherein, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases;
After described PRACH is carried out PRACH detection by described base station, it is determined that send the time advance amount TA of the UE of described PRACH;
Described TA is sent to described UE by described base station, so that described UE adjusts uplink transmission time according to described TA.
Preferably, described base station utilizes multistage sample window, receives the PRACH of the UE from Cover treatment scope respectively, comprising:
Described base station sets multistage sample window in advance, and described multistage sample window at least comprises first step sample window and second stage sample window, and described second stage sample window postpones preset time period than the initial time of described first step sample window;
Described base station utilizes described first step sample window and described second stage sample window, receives the PRACH of the UE from Cover treatment scope respectively.
Preferably, described method also comprises:
The resource of the preset length after the protection interval GT of described PRACH, when carrying out resources allocation for UE, is put sky by described base station.
Preferably, described preset length is directly proportional to the maximal cover radius of described base station.
Preferably, described TA is sent to described UE by described base station, comprising:
When the distance of described UE and described base station is not more than 160km, the described TA that described base station carries by 11bit is sent to described UE;
When the distance of described UE and described base station is greater than 160km, the described TA that described base station carries by 12bit is sent to described UE, and wherein said 12bit comprises the 1bit that agreement retains.
Present invention also offers the multi-upstream access device in a kind of LTE system, described device comprises:
Receiver module, for using multistage sample window, receive the physical accidental access channel PRACH of the terminal UE from Cover treatment scope respectively, wherein, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases;
Determination module, after carrying out PRACH detection to described PRACH, it is determined that sends the time advance amount TA of the UE of described PRACH;
Sending module, for being sent to described UE by described TA, so that described UE adjusts uplink transmission time according to described TA.
Preferably, described receiver module, comprising:
Arranging submodule block, for setting multistage sample window in advance, described multistage sample window at least comprises first step sample window and second stage sample window, and described second stage sample window postpones preset time period than the initial time of described first step sample window;
Receive submodule block, for utilizing described first step sample window and described second stage sample window, receive the PRACH of the UE from Cover treatment scope respectively.
Preferably, described device also comprises:
Distribution module, for when carrying out resources allocation for UE, putting sky by the resource of the preset length after the protection interval GT of described PRACH.
Preferably, described preset length is directly proportional to the maximal cover radius of described base station.
Preferably, described sending module, comprising:
First transmission submodule block, for when the distance of described UE and described base station is not more than 160km, being sent to described UE by the described TA of 11bit carrying;
2nd transmission submodule block, for when the distance of described UE and described base station is greater than 160km, being sent to described UE by the described TA of 12bit carrying, wherein said 12bit comprises the 1bit that agreement retains.
Present invention also offers the multi-upstream access base station in a kind of LTE system, described base station comprises storer and treater,
Described storer is used for program code stored, and described program code is transferred to described treater;
Described treater is used for according to the instruction in described program code, perform following step: use multistage sample window, receive the physical accidental access channel PRACH of the terminal UE from Cover treatment scope respectively, wherein, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases; After described PRACH is carried out PRACH detection, it is determined that send the time advance amount TA of the UE of described PRACH; Described TA is sent to described UE, so that described UE adjusts uplink transmission time according to described TA.
In up-link access method in LTE system provided by the invention, base station utilizes multistage sample window, receives the PRACH of the terminal UE from Cover treatment scope respectively, and the progression that described multistage sample window comprises is directly proportional to the maximal cover radius of described base station.After described PRACH is carried out PRACH detection by described base station, it is determined that send the time advance amount TA of the UE of described PRACH. Finally, described TA is sent to described UE by described base station, so that described UE adjusts uplink transmission time according to described TA. The present invention utilizes multistage sample window to realize the cascade sampling of the UE to different distance scope, realizes the multi-upstream access that LTE system middle distance base station is greater than the UE of 100km more accurately.
Accompanying drawing explanation
In order to the technical scheme being illustrated more clearly in the embodiment of the present application, below the accompanying drawing used required in embodiment being described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The schema of the up-link access method in a kind of LTE system that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 utilizes multistage sample window collection from the schematic diagram of the PRACH sequence of the UE apart from described base station different distance for a kind of base station that the embodiment of the present invention provides;
A kind of frame format schematic diagram utilizing 12bit to carry TA that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the multi-upstream access device in a kind of LTE system that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the multi-upstream access base station in a kind of LTE system that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is only some embodiments of the present application, instead of whole embodiments. Based on the embodiment in the application, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of the application's protection.
At present, according to 3GPP agreement, the coverage distance the farthest away that the base station of standard LTE design can be supported is 100km. The demand of the enforcement scene of the coverage distance super far away being greater than 100km to meet, the up-link access method that the embodiment of the present invention provides utilizes multistage sample window to realize the cascade sampling of the UE to different distance scope, it is achieved LTE system middle distance base station is greater than the multi-upstream access of the UE of 100km. In addition, in the embodiment of the present invention, the resource of preset length after the GT of PRACH is not distributed to any UE when resources allocation by base station, it is achieved the expansion of PRACH, and then makes the PRACH after expanding can support that distance is greater than the multi-upstream access of the UE of 100km.
In the examples below, terminal can be interphone, but is not limited to this.
Below the embodiment of the present invention is described.
With reference to figure 1, being the schema of the up-link access method in a kind of LTE system that the embodiment of the present invention provides, described method comprises:
S101: base station uses multistage sample window, receives the PRACH of the terminal UE from Cover treatment scope respectively, and wherein, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases.
S102: after described PRACH is carried out PRACH detection by described base station, it is determined that send the time advance amount TA of the UE of described PRACH.
S103: described TA is sent to described UE by described base station, so that described UE adjusts uplink transmission time according to described TA.
Due in the overlength distance covering scene of LTE system, from base station more away from the Preamble that sends of terminal, the time arriving described base station is also more late.So the protection interval GT of PRACH conflicts with next sub-frame of uplink to avoid arriving the more late Preamble in base station. The embodiment of the present invention covers to realize base station overlength distance; make distance base station more than 100km; even can successfully access described base station more than the terminal of 160km; so; base station in the embodiment of the present invention is when carrying out resources allocation for terminal; the resource of the preset length after the protection interval GT of PRACH is put sky, thus extends the length of GT, form expansion PRACH. Wherein, the described preset length being set to null is directly proportional to the maximal cover radius of described base station.
In S101, owing to the distance of the terminal distance base station in the overlength distance covering scene of LTE system can more than 100km, even more than 160km, so, described base station only utilizes at present can not the PRACH that sends to the terminal of overlength distance of accurate acquisition for gathering the sample window of the terminal within 100km. The embodiment of the present invention uses multistage sample window, gathers the PRACH being in the UE of Cover treatment scope and sending respectively. Concrete, see that the progression of the sample window that described base station has is directly proportional to the maximal cover radius of described base station on the whole. Concrete, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases. When the maximal cover radius of described base station increases in a ladder, the progression that described multistage sample window comprises is constant, only when the maximal cover radius of described base station is increased to next ladder, the progression that described multistage sample window comprises just can increase one-level. Such as, the maximal cover radius of described base station increases in a ladder and refers to that the maximal cover radius of described base station is between 1-100km, or changes between 100km-200km. The maximal cover radius of described base station is increased to next ladder and refers to that the maximal cover radius of described base station is changed between 100km-200km between 1-100km.
In practical application, each terminal according to the distance of terminal apart from described base station, can be belonged to the sample window collection of different grades by described base station. Such as, first step sample window is utilized to gather the terminal being 0-100km apart from described base station distance, utilizing second stage sample window to gather the terminal being 100km-200km apart from described base station distance, the rest may be inferred, it is achieved different grades sample window is to the collection of the terminal of Cover treatment scope. Wherein, described second stage sample window postpones preset time period than the initial time of described first step sample window, and the rest may be inferred, and rear stage sample window exists delay compared with the initial time of previous stage sample window. Such as, 0.67ms is postponed for gathering the second stage sample window apart from base station 100km-200km than for gathering the initial time of the first step sample window apart from base station 0-100km.
As shown in Figure 2, a kind of base station provided for the embodiment of the present invention utilizes multistage sample window collection from the schematic diagram of the PRACH sequence of the UE apart from described base station different distance. Wherein, first step sample window is for gathering the PRACH sequence of the terminal from 0-100km, and second stage sample window is for gathering the PRACH sequence of the terminal from 100km-200km. Owing to CP part is the data that ring shift after PRACH comes, so first step sample window can collect the partial data of the PRACH sequence from 0-100km terminal, and second stage sample window can collect the partial data of the PRACH sequence from 100km-200km terminal, the rest may be inferred.
In S102, described base station is by carrying out PRACH detection to the PRACH from different terminals collected, it is determined that the time advance amount TA of different terminals. Wherein, time advance amount TA corresponding to the terminal that distance apart from described base station is more far away is longer. Concrete, the method that PRACH is carried out PRACH detection by described base station is more, does not repeat them here.
Each terminal in S103, after the time advance amount TA that each terminal is corresponding is determined in described base station, described TA is sent to counterpart terminal, so that according to the TA received separately, can adjust the uplink transmission time of self. Wherein, longer apart from the TA of described base station distance terminal far away, then described terminal needs the long period in advance to launch upper row data.
In up-link access method in the LTE system that the embodiment of the present invention provides, base station utilizes multistage sample window, receives the PRACH of the UE from Cover treatment scope respectively, and the progression that described multistage sample window comprises is directly proportional to the maximal cover radius of described base station. After described PRACH is carried out PRACH detection by described base station, it is determined that send the time advance amount TA of the UE of described PRACH. Finally, described TA is sent to described UE by described base station, so that described UE adjusts uplink transmission time according to described TA. The embodiment of the present invention utilizes multistage sample window to realize the cascade sampling of the UE to different distance scope, base station realizes the multi-upstream access that LTE system middle distance base station is greater than the UE of 100km more accurately, so that can support that farther coverage distance is to reduce cost of arranging net.
In addition, owing in current LTE standard agreement, the TA of regulation can only be carried by 11bit, though will the scope of [0,2^11-1] all with expiring, then can hold the distance of base station coverage 160km by the most remote branch of a clan. In fact only having used [0,1282] this scope at present, namely TA value is 1282*16Ts=0.67ms, respective base station largest coverage distance 100km.
In order to make the value of TA to support, base station realizes covering more at a distance the embodiment of the present invention, so the bit that current agreement in frame structure retains also is used for carrying TA by the embodiment of the present invention, that is, the embodiment of the present invention can utilize 12bit to carry TA, so that TA value now can support that base station realizes covering more at a distance, in fact can support that base station the farthest realizes the coverage distance of 320km. As shown in Figure 3, for a kind of frame format schematic diagram utilizing 12bit to carry TA that the embodiment of the present invention provides, wherein, R is the bit that current agreement retains, the embodiment of the present invention utilizes the TimingAdvanceCommand of a bit and original 11bit of R jointly to carry TA, so that the TA value that can carry is bigger, and then support that base station the farthest realizes the coverage distance of 320km.
In practical application, base station, before sending TA to each UE, first determines whether the distance of described UE and base station looked into 160km. When the distance of described UE and described base station is not more than 160km, the described TA that described base station carries by 11bit is sent to described UE; When the distance of described UE and described base station is greater than 160km, the described TA that described base station carries by 12bit is sent to described UE, and wherein said 12bit comprises the 1bit that agreement retains. The embodiment of the present invention is by the expansion of the frame structure to carrying TA, it is achieved the overlength distance of base station covers.
The embodiment of the present invention additionally provides the multi-upstream access device in a kind of LTE system, with reference to figure 4, is the multi-upstream access apparatus structure schematic diagram in a kind of LTE system that the embodiment of the present invention provides, and described device comprises:
Receiver module 401, for using multistage sample window, receives the PRACH of the terminal UE from Cover treatment scope respectively, and wherein, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases;
Determination module 402, after carrying out PRACH detection to described PRACH, it is determined that sends the time advance amount TA of the UE of described PRACH;
Sending module 403, for being sent to described UE by described TA, so that described UE adjusts uplink transmission time according to described TA.
The embodiment of the present invention covers to realize the overlength distance of base station, make distance base station more than 100km, even can successfully access described base station more than the terminal of 160km, so, the embodiment of the present invention utilizes multistage sample window to realize the cascade sampling of the UE to different distance scope, realizes the multi-upstream access that LTE system middle distance base station is greater than the UE of 100km more accurately.
In practical application, described receiver module 401 can comprise:
Arranging submodule block, for setting multistage sample window in advance, described multistage sample window at least comprises first step sample window and second stage sample window, and described second stage sample window postpones preset time period than the initial time of described first step sample window;
Receive submodule block, for utilizing described first step sample window and described second stage sample window, receive the described PRACH of the UE from Cover treatment scope respectively.
In addition, due in the overlength distance covering scene of LTE system, from base station more away from the Preamble that sends of terminal, the time arriving described base station is also more late. So the protection interval GT of PRACH conflicts with next sub-frame of uplink to avoid arriving the more late Preamble in base station. The embodiment of the present invention covers to realize base station overlength distance so that described base station, more than 100km, even can successfully be accessed more than the terminal of 160km in distance base station, and described device can also comprise:
Distribution module, for when carrying out resources allocation for UE, putting sky by the resource of the preset length after the protection interval GT of described PRACH.
Wherein, described preset length is directly proportional to the maximal cover radius of described base station.
In order to support that base station can realize farther coverage distance, the frame structure of carrying TA is expanded by the embodiment of the present invention, concrete, it is possible to use 12bit carries described TA, and wherein said 12bit comprises the 1bit that agreement retains.
Concrete, described sending module can comprise:
First transmission submodule block, for when the distance of described UE and described base station is not more than 160km, being sent to described UE by the described TA of 11bit carrying;
2nd transmission submodule block, for when the distance of described UE and described base station is greater than 160km, being sent to described UE by the described TA of 12bit carrying, wherein said 12bit comprises the 1bit that agreement retains.
Multi-upstream access device in the LTE system that the embodiment of the present invention provides can realize following functions: utilizes multistage sample window, receiving the described expansion PRACH of the UE from Cover treatment scope respectively, the progression that described multistage sample window comprises is directly proportional to the maximal cover radius of described base station. After described expansion PRACH is carried out PRACH detection, it is determined that send the time advance amount TA of the UE of described expansion PRACH. Described TA is sent to described UE, so that described UE adjusts uplink transmission time according to described TA. The embodiment of the present invention utilizes multistage sample window to realize the cascade sampling of the UE to different distance scope, realizes the multi-upstream access that LTE system middle distance base station is greater than the UE of 100km more accurately. In addition, the embodiment of the present invention, by the frame structure of carrying TA being expanded, utilizes 12bit to carry TA such that it is able to support that base station realizes farther coverage distance.
Present invention also offers the structural representation of the multi-upstream access base station in a kind of LTE system, as shown in Figure 5, wherein, described base station at least comprises a storer 501 and at least one treater 502, also comprises at least one network interface 503; It is interconnected by bus between storer 501, treater 502 and network interface 503.
Storer 501 is for program code stored, and this program code is transferred to this treater 502.
Treater 502 is for according to the instruction in described program code, perform following step: use multistage sample window, receive the PRACH of the terminal UE from Cover treatment scope respectively, wherein, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases; After described PRACH is carried out PRACH detection, it is determined that send the time advance amount TA of the UE of described PRACH; Described TA is sent to described UE, so that described UE adjusts uplink transmission time according to described TA.
Further, described treater 502 sets multistage sample window in advance, and described multistage sample window at least comprises first step sample window and second stage sample window, and described second stage sample window postpones preset time period than the initial time of described first step sample window;
Described base station utilizes described first step sample window and described second stage sample window, receives the PRACH of the UE from Cover treatment scope respectively.
Further, the resource of the preset length after the protection interval GT of described PRACH, when carrying out resources allocation for UE, is put sky by described treater 502; Described preset length is directly proportional to the maximal cover radius of described base station.
Further, when the distance of described UE and described base station is not more than 160km, the described TA that described treater 502 carries by 11bit is sent to described UE;
When the distance of described UE and described base station is greater than 160km, the described TA that described treater 502 carries by 12bit is sent to described UE, and wherein said 12bit comprises the 1bit that agreement retains.
For device embodiment, owing to it corresponds essentially to embodiment of the method, so relevant part illustrates see the part of embodiment of the method. System embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or can also be distributed on multiple NE. Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme. Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
It should be noted that, herein, the such as relational terms of first and second grades and so on is only used for separating an entity or operation with another entity or operational zone, and not necessarily requires or imply to there is any this kind of actual relation or sequentially between these entities or operation. And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, so that comprise the process of a series of key element, method, article or equipment not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise the key element intrinsic for this kind of process, method, article or equipment. When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Up-link access method in a kind of LTE system embodiment of the present invention provided above, device and base station are described in detail, apply specific case herein the principle of the present invention and enforcement mode to have been set forth, illustrating just for helping the method understanding the present invention and core concept thereof of above embodiment;Meanwhile, for one of ordinary skill in the art, according to the thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (11)
1. the up-link access method in a LTE system, it is characterised in that, described method comprises:
Base station uses multistage sample window, receives the physical accidental access channel PRACH of the terminal UE from Cover treatment scope respectively, and wherein, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases;
After described PRACH is carried out PRACH detection by described base station, it is determined that send the time advance amount TA of the UE of described PRACH;
Described TA is sent to described UE by described base station, so that described UE adjusts uplink transmission time according to described TA.
2. method according to claim 1, it is characterised in that, described base station uses multistage sample window, receives the PRACH of the UE from Cover treatment scope respectively, comprising:
Described base station sets multistage sample window in advance, and described multistage sample window at least comprises first step sample window and second stage sample window, and described second stage sample window postpones preset time period than the initial time of described first step sample window;
Described base station uses described first step sample window and described second stage sample window, receives the PRACH of the UE from Cover treatment scope respectively.
3. method according to claim 1, it is characterised in that, described method also comprises:
The resource of the preset length after the protection interval GT of described PRACH, when carrying out resources allocation for UE, is put sky by described base station.
4. method according to claim 3, it is characterised in that, described preset length is directly proportional to the maximal cover radius of described base station.
5. method according to claim 1, it is characterised in that, described TA is sent to described UE by described base station, comprising:
When the distance of described UE and described base station is not more than 160km, the described TA that described base station carries by 11bit is sent to described UE;
When the distance of described UE and described base station is greater than 160km, the described TA that described base station carries by 12bit is sent to described UE, and wherein said 12bit comprises the 1bit that agreement retains.
6. the multi-upstream access device in a LTE system, it is characterised in that, described device comprises:
Receiver module, for using multistage sample window, receive the physical accidental access channel PRACH of the terminal UE from Cover treatment scope respectively, wherein, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases;
Determination module, after carrying out PRACH detection to described PRACH, it is determined that sends the time advance amount TA of the UE of described PRACH;
Sending module, for being sent to described UE by described TA, so that described UE adjusts uplink transmission time according to described TA.
7. device according to claim 6, it is characterised in that, described receiver module, comprising:
Arranging submodule block, for setting multistage sample window in advance, described multistage sample window at least comprises first step sample window and second stage sample window, and described second stage sample window postpones preset time period than the initial time of described first step sample window;
Receive submodule block, for using described first step sample window and described second stage sample window, receive the PRACH of the UE from Cover treatment scope respectively.
8. device according to claim 6, it is characterised in that, described device also comprises:
Distribution module, for when carrying out resources allocation for UE, putting sky by the resource of the preset length after the protection interval GT of described PRACH.
9. device according to claim 8, it is characterised in that, described preset length is directly proportional to the maximal cover radius of described base station.
10. device according to claim 6, it is characterised in that, described sending module, comprising:
First transmission submodule block, for when the distance of described UE and described base station is not more than 160km, being sent to described UE by the described TA of 11bit carrying;
2nd transmission submodule block, for when the distance of described UE and described base station is greater than 160km, being sent to described UE by the described TA of 12bit carrying, wherein said 12bit comprises the 1bit that agreement retains.
Multi-upstream access base station in 11. 1 kinds of LTE system, it is characterised in that, described base station comprises storer and treater,
Described storer is used for program code stored, and described program code is transferred to described treater;
Described treater is used for according to the instruction in described program code, perform following step: use multistage sample window, receive the physical accidental access channel PRACH of the terminal UE from Cover treatment scope respectively, wherein, along with the staged of the maximal cover radius of described base station increases, the progression that described multistage sample window comprises also increases; After described PRACH is carried out PRACH detection, it is determined that send the time advance amount TA of the UE of described PRACH; Described TA is sent to described UE, so that described UE adjusts uplink transmission time according to described TA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510993270.1A CN105657854B (en) | 2015-12-25 | 2015-12-25 | Uplink access method, device and base station in LTE system |
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| CN201510993270.1A CN105657854B (en) | 2015-12-25 | 2015-12-25 | Uplink access method, device and base station in LTE system |
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| CN105657854A true CN105657854A (en) | 2016-06-08 |
| CN105657854B CN105657854B (en) | 2019-12-27 |
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| CN201510993270.1A Active CN105657854B (en) | 2015-12-25 | 2015-12-25 | Uplink access method, device and base station in LTE system |
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| WO2017107197A1 (en) * | 2015-12-25 | 2017-06-29 | 海能达通信股份有限公司 | Upstream access method, apparatus and base station in lte system |
| CN110109509A (en) * | 2019-03-27 | 2019-08-09 | 北京比特大陆科技有限公司 | Delay correction method, circuit, device, equipment and computer readable storage medium |
| WO2021128291A1 (en) * | 2019-12-27 | 2021-07-01 | Oppo广东移动通信有限公司 | Random access method and terminal device |
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| CN102724149A (en) * | 2012-05-16 | 2012-10-10 | 华为技术有限公司 | Frequency offset precompensation method, random access method, equipment and system |
| CN102938931A (en) * | 2011-08-15 | 2013-02-20 | 北京为邦远航无线技术有限公司 | Wide-range nonsynchronous uplink accessing method and device |
| US20150305066A1 (en) * | 2014-04-21 | 2015-10-22 | Samsung Electronics Co., Ltd. | Method and apparatus for random access in wireless communication system |
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| CN102938931A (en) * | 2011-08-15 | 2013-02-20 | 北京为邦远航无线技术有限公司 | Wide-range nonsynchronous uplink accessing method and device |
| CN102724149A (en) * | 2012-05-16 | 2012-10-10 | 华为技术有限公司 | Frequency offset precompensation method, random access method, equipment and system |
| US20150305066A1 (en) * | 2014-04-21 | 2015-10-22 | Samsung Electronics Co., Ltd. | Method and apparatus for random access in wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017107197A1 (en) * | 2015-12-25 | 2017-06-29 | 海能达通信股份有限公司 | Upstream access method, apparatus and base station in lte system |
| CN110109509A (en) * | 2019-03-27 | 2019-08-09 | 北京比特大陆科技有限公司 | Delay correction method, circuit, device, equipment and computer readable storage medium |
| WO2021128291A1 (en) * | 2019-12-27 | 2021-07-01 | Oppo广东移动通信有限公司 | Random access method and terminal device |
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| CN105657854B (en) | 2019-12-27 |
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