CN101102605B - random access method of cellular wireless communication system - Google Patents
random access method of cellular wireless communication system Download PDFInfo
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- CN101102605B CN101102605B CN2007101381000A CN200710138100A CN101102605B CN 101102605 B CN101102605 B CN 101102605B CN 2007101381000 A CN2007101381000 A CN 2007101381000A CN 200710138100 A CN200710138100 A CN 200710138100A CN 101102605 B CN101102605 B CN 101102605B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/04—Scheduled or contention-free access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
The method comprises: during the process of initializing the random access, layer 2 and layer 3 send the receiving time window to the physical layer; during random access process, according to the receiving time window or indication of layer 2 or layer 3, the physical layer determines the time of stopping the random access.
Description
Technical field
The present invention relates to the communications field, and particularly, relate to the accidental access method of cellular radio communication system.
Background technology
As shown in Figure 1, mainly (Core Network CN) forms cellular radio communication system by terminal, base station and core net.The network that the base station is formed is called wireless access network, and (RadioAccess Network RAN), is responsible for the Access Layer affairs, for example the management of Radio Resource etc.The base station can exist physics or connection in logic according to actual conditions between (for example, base station among Fig. 11 and base station 2 or base station 3).Each base station can be connected with one or more than one core net node.Core net is responsible for the Non-Access Stratum affairs, for example position renewal etc.Terminal is meant the various device that can carry out communication with cellular radio communication system, for example mobile phone, personal digital assistant, notebook computer etc.
In order to express conveniently, radio protocol layer more than the physical layer is abbreviated as upper-layer protocol herein, typically refer to MAC (the Media Access Control in the cellular radio communication system, the medium access control) layer protocol, RLC (Radio Link Control, Radio Link control) the some agreements in layer protocol or RRC (Radio Resource Control, the RRM) layer protocol or the combination of several protocol layers.These agreements are also referred to as layer 2, layer 3 agreement.
The random access procedure of cellular radio communication system generally can comprise following three steps from the angle of physical layer: 1, the physical layer protocol of terminal sends random access guiding message under the requirement of upper-layer protocol; 2, network side is replied accidental access response message; 3, the physical layer of terminal passes to upper-layer protocol to the accidental access response message of receiving and does further processing.
Terminal sent random accessing message leading after, might can not receive accidental access response message.Reason may be the random access guiding that receives of base station signal signal to noise ratio too a little less than, perhaps the base station has sent accidental access response message, but the signal to noise ratio that terminal has been missed time that receives or the accidental access response message that receives causes decoding a little less than too etc.Terminal can influence further carrying out of random access procedure for the judgement that whether has in time received accidental access response message, and for example, whether terminal can be made a strategic decision retransmits the power of random access guiding message and repeating transmission or no longer retransmit etc.
In the existing LTE (long evolving system), random access procedure comprises that following three step: a, terminal send random access guiding message on certain random access time slot; The accidental access response message of b, base station response; If the c1 terminal is received in receive window at the accidental access response message of the random access guiding message that has sent, is made corresponding processing according to its content so; If the c2 terminal is not received any accidental access response message in the time of reception window, can think so and may trigger this random access procedure failure and retransmit random access guiding message or finish this random access procedure.
In step a, different terminals may send similar and different random access guiding on identical random access time slot.In step b, the accidental access response message that reply the base station may comprise the response message at 1 or 1 above terminal.The content of accidental access response message also may be distributed in different TTI (Transfer Time Interval in the time of reception window, Transmission Time Interval) in, that is to say that terminal may be received a plurality of accidental access response messages in the time of reception window.The time of reception window is a time interval, be used for defining terminal after having sent random access guiding, wait for the time range of accidental access response message, can be with for example representing with respect to sending random access guiding message time started and the concluding time constantly, but do not limit therewith.
Above-mentioned step c1 and c2 further can illustrate that this model is to describe from the angle of terminal with mutual model between the physical layer of terminal in the random access procedure of LTE and the upper-layer protocol, as shown in Figure 2:
At first, the upper-layer protocol of terminal triggers physical layer and sends random access guiding; Afterwards, if physical layer is received accidental access response message, this message is passed to upper-layer protocol; If upper-layer protocol is received the Indication message (that is, behind the accidental access response message) that physical layer is transmitted, may trigger the transmission of upper-layer protocol message; If judging, physical layer do not receive accidental access response message, then this judged result is passed to upper-layer protocol, upper-layer protocol is received the Indication message that physical layer is transmitted, and after promptly physical layer is confirmed not receive accidental access response message, may trigger the repeating transmission of random access guiding message.
As mentioned above, at present, all finish in physical layer for the judgement of the state of ACK (receiving accidental access response) and NACK (not receiving accidental access response).
Upper-layer protocol is after having triggered physical layer transmission random access guiding message; in order to prevent to wait for the Indication message of physical layer always; a protection timer can be set; be similar to UMTS (Universal Mobile Telecommunication System) system MAC (Media Access Control; the medium access control) the timer T2 of She Zhiing; promptly; if do not receive the Indication message of physical layer in the time of timer protection, then upper-layer protocol can be thought and not receive accidental access response message.
But in fact, physical layer is not also known the timer guard time of upper-layer protocol.Physical layer will be in accepting state always like this, may receive the accidental access response information of other-end, and ceaselessly sends to the upper-layer protocol processing, and this has increased the processing complexity.
Summary of the invention
Consider the above-mentioned problems in the prior art and propose the present invention.For this reason, the present invention aims to provide a kind of accidental access method of cellular radio communication system.
In the method according to this invention, in the initialization random access procedure, the second layer, the 3rd layer of transmission time of reception window are to physical layer, in random access procedure, physical layer determines to stop the time of receiving random access response message according to time of reception window or the second layer, the 3rd layer indication.
Above-mentioned time of reception window is a time interval, is used to be defined in the second layer, the 3rd layer protocol has triggered after the transmission of random access guiding, and physical layer is waited for the time range of accidental access response message.
In random access procedure, comprise following processing: the second layer, the 3rd layer of triggering physical layer send random access guiding; Physical layer begins to wait for accidental access response message after the transmission of finishing random access guiding; If physical layer has received accidental access response message in the time of reception window, then the accidental access response message that receives is passed to the second layer, the 3rd layer; Whether the accidental access response message of the second layer, the 3rd layer of judgement transmission is corresponding with the random access guiding that sends, and is under the situation that is in judged result, and the notice physical layer stops to continue receiving random access response message.
In above-mentioned processing, if physical layer has received a plurality of accidental access response messages in the time of reception window, a plurality of accidental access response messages that then will receive all pass to the second layer, the 3rd layer, unless the second layer, the 3rd layer require physical layer to stop to receive random response message.
When the time of reception window arrived, physical layer stopped to continue receiving random access response message.
Perhaps, in random access procedure, can also comprise following processing: the second layer, the 3rd layer of triggering physical layer send random access guiding; Physical layer begins to wait for accidental access response message after the transmission of finishing random access guiding; If physical layer does not receive any accidental access response message in the time of reception window, then when the time of reception window arrives, stop to continue receiving random access response message, and report the second layer, the 3rd layer not receive accidental access response message.
In addition, in the initialization random access procedure, the second layer, the 3rd layer in also below physical layer sends any or a plurality of: the frequency location of Jie Ruing, time cycle, time offset, leading form, preamble sequence set, ZC sequence numbering, leading transmitting power at random.In random access procedure, physical layer can be determined the time of beginning receiving random access response message according to the time of reception window.
By the present invention, in random access procedure, physical layer determines to begin/stop reception to the random process response signal according to the time of reception window, improved the efficient of protocol processes, reduce the complexity of physical layer process, and reduced the signaling burden that parameter transmission between physical layer and the high level and message are transmitted.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the cellular radio communication system of prior art;
Fig. 2 is according to the mutual schematic diagram between the physical layer of prior art and the upper-layer protocol;
Fig. 3 is the schematic diagram according to time of reception window in the accidental access method of the cellular radio communication system of the embodiment of the invention;
Fig. 4 is the flow chart according to the example 1 of the accidental access method of the cellular mobile system of the embodiment of the invention; And
Fig. 5 is the flow chart according to the example 2 of the accidental access method of the cellular mobile system of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
According to the embodiment of the invention, provide a kind of accidental access method of cellular radio communication system.
In this method according to the embodiment of the invention, in the initialization random access procedure, layer 2, layer 3 (promptly, the second layer mentioned above, the 3rd layer) send the time of reception window (particularly, the parameter of time of reception window) gives physical layer (layer 1), like this, in random access procedure, physical layer is according to time of reception window or layer 2, the indication of layer 3 determines to stop time (if the layer 2 of receiving random access response message, layer 3 has relevant indication, then operate according to this indication, if there is not layer 2, not indication of layer 3, then when the time of reception window reached, physical layer stopped the reception to accidental access response message automatically).In addition, physical layer also can be determined the time of beginning receiving random access response message according to random access window.
In addition, in the initialization random access procedure, layer 2, layer 3 also need any in (parameter) or a plurality of below physical layer sends: the frequency location of Jie Ruing, time cycle, time offset, leading form, preamble sequence set, ZC sequence numbering, leading transmitting power etc. at random.
Especially, above-mentioned time of reception window (reception TTI window) is a time interval, be used to be defined in the layer 2, the layer 3 agreement triggered after the transmission of random access guiding, physical layer is waited for the time range of accidental access response message, promptly, can with " time of reception window " parameter-definition random access window time started (RA_WINDOW_BEGIN) and the period of random access window between the concluding time, i.e. RA_WINDOW_BEGIN-RA_WINDOW_END.
In embodiment described below and example, as shown in Figure 3, for convenience of explanation, for example, the repetition period of supposing random access time slot prevailingly is 10 milliseconds, random access time slot is 1 millisecond apart from the skew of radio frames, and the time started of time of reception window, the concluding time of time of reception window was apart from 5 milliseconds of time starteds apart from 2 milliseconds of random access time slots.The reason that the high level of terminal (layer 2, layer 3) agreement triggers physical layer transmission random access guiding may be that terminal wants to set up the RRC wireless connections, or received the switching command that the base station sends, requirement switches to Target cell, thereby or terminal want to regain the up up or descending data of recovering synchronously and send.
In the time of reception window, physical layer may have been received accidental access response message, also may not receive accidental access response message, below will be described the processing under above-mentioned two kinds of situations in conjunction with example respectively.
Example 1: physical layer has received accidental access response message in the time of reception window
As shown in Figure 4, comprise following processing:
Step S402, layer 2, layer 3 (for example, MAC layer) trigger physical layer and send random access guiding;
Step S404, physical layer begins to wait for accidental access response message after the transmission of finishing random access guiding;
Step S406 if physical layer has received accidental access response message in the time of reception window, then passes to the accidental access response message that receives layer 2, layer 3;
Step S408, layer 2, layer 3 judge whether the accidental access response message that transmits is corresponding with the random access guiding that sends, and is under the situation that is in judged result, and the notice physical layer stops to continue receiving random access response message.
In above-mentioned processing, if physical layer has received a plurality of accidental access response messages in the time of reception window, a plurality of accidental access response messages that then will receive all pass to layer 2, layer 3, unless layer 2, layer 3 have required physical layer to stop to receive random response message.
If the accidental access response message that physical layer is received in the time of reception window is all not corresponding with the random access guiding that sends through judging, promptly, layer 2, layer 3 will not send the notice that stops receiving random access response message, like this, when the time of reception window arrives, physical layer will stop to continue receiving random access response message automatically.
Example 2: physical layer does not receive any accidental access response message in the time of reception window
As shown in Figure 5, comprise following processing:
Step S502, layer 2, layer 3 (for example, MAC layer) trigger physical layer and send random access guiding;
Step S504, physical layer begins to wait for accidental access response message after the transmission of finishing random access guiding;
Step S506 if physical layer does not receive any accidental access response message in the time of reception window, then stops to continue receiving random access response message when the time of reception window arrives, and reports layer 2, layer 3 not to receive accidental access response message.
The time started that it should be noted that physical layer receiving random access response message can be consistent with the concluding time of physical layer transmission random access guiding, also can be inconsistent.By being provided with, physical layer also can decide the time of beginning receiving random access response message according to the time of reception window.
By the present invention, in random access procedure, physical layer determines to begin/stop reception to the random process response signal according to the time of reception window, improved the efficient of protocol processes, reduce the complexity of physical layer process, and reduced the signaling burden that parameter transmission between physical layer and the high level and message are transmitted.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the accidental access method of a cellular radio communication system, it is characterized in that, in the initialization random access procedure, the second layer, the 3rd layer of transmission time of reception window are to physical layer, in random access procedure, physical layer determines to stop the time of receiving random access response message according to time of reception window or the second layer, the 3rd layer indication, wherein, described time of reception window is a time interval, be used to be defined in the described second layer, the 3rd layer and triggered after the transmission of random access guiding, described physical layer is waited for the time range of accidental access response message.
2. method according to claim 1 is characterized in that, in random access procedure, comprises following processing:
The described second layer, the 3rd layer of described physical layer of triggering send random access guiding;
Described physical layer begins to wait for accidental access response message after the transmission of finishing random access guiding;
If described physical layer has received accidental access response message in described time of reception window, the described accidental access response message that then will receive passes to the described second layer, the 3rd layer;
Whether the described accidental access response message of the described second layer, the 3rd layer of judgement transmission is corresponding with the described random access guiding that sends, and is under the situation that is in judged result, notifies described physical layer to stop to continue receiving random access response message.
3. method according to claim 2, it is characterized in that, if described physical layer has received a plurality of accidental access response messages in described time of reception window, described a plurality of accidental access response messages that then will receive all pass to the described second layer, the 3rd layer, unless the described second layer, the 3rd layer require described physical layer to stop to receive random response message.
4. method according to claim 2, it is characterized in that, if physical layer does not receive the corresponding accidental access response message of described random access guiding any and transmission in the time of reception window, when described time of reception window arrived, described physical layer stopped to continue receiving random access response message.
5. method according to claim 1 is characterized in that, random access procedure comprises following processing:
The described second layer, the 3rd layer of described physical layer of triggering send random access guiding;
Described physical layer begins to wait for accidental access response message after the transmission of finishing random access guiding;
If described physical layer does not receive any accidental access response message in described time of reception window, then when described time of reception window arrives, stop to continue receiving random access response message, and report the described second layer, the 3rd layer not receive accidental access response message.
6. according to each described method in the claim 1 to 5, it is characterized in that, in the initialization random access procedure, the described second layer, the 3rd layer in further below described physical layer sends any or a plurality of: the frequency location of Jie Ruing, time cycle, time offset, leading form, preamble sequence set, ZC sequence numbering, leading transmitting power at random.
7. according to each described method in the claim 1 to 5, it is characterized in that in random access procedure, described physical layer is determined the time of beginning receiving random access response message according to described time of reception window.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101381000A CN101102605B (en) | 2007-08-15 | 2007-08-15 | random access method of cellular wireless communication system |
| PCT/CN2008/071393 WO2009021419A1 (en) | 2007-08-15 | 2008-06-20 | A random access method for cellular radio communication system |
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| CN2007101381000A CN101102605B (en) | 2007-08-15 | 2007-08-15 | random access method of cellular wireless communication system |
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| CN101102605B true CN101102605B (en) | 2011-12-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101102605B (en) * | 2007-08-15 | 2011-12-07 | 中兴通讯股份有限公司 | random access method of cellular wireless communication system |
| CN101547075B (en) * | 2008-03-25 | 2013-08-21 | 中兴通讯股份有限公司 | Method for sending and receiving system messages |
| CN101562897B (en) * | 2008-04-18 | 2010-11-17 | 大唐移动通信设备有限公司 | Method for determining a random access leading sequence response transmit window as well as device and system thereof |
| CN102448181B (en) * | 2010-09-30 | 2016-04-06 | 重庆重邮信科通信技术有限公司 | TDD-LTE system contention resolved accidental access method |
| CN107431983B (en) * | 2015-03-11 | 2020-11-17 | Lg 电子株式会社 | Method for operating fast random access procedure in wireless communication system and apparatus therefor |
| CN111741517A (en) | 2015-08-14 | 2020-10-02 | 华为技术有限公司 | Information transmission method, base station and user equipment |
| WO2018058408A1 (en) * | 2016-09-29 | 2018-04-05 | 华为技术有限公司 | Random access configuration method and device thereof |
| JP6897443B2 (en) * | 2017-09-13 | 2021-06-30 | ブラザー工業株式会社 | Control system, sub-control device and control method |
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| CN1448035A (en) * | 2000-08-21 | 2003-10-08 | 西门子公司 | Method for controlling access in radio communications system |
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| EP1742501A1 (en) * | 1998-08-17 | 2007-01-10 | LG Electronics Inc. | Method for processing random access in mobile communication system |
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| CN101102605B (en) * | 2007-08-15 | 2011-12-07 | 中兴通讯股份有限公司 | random access method of cellular wireless communication system |
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| EP1742501A1 (en) * | 1998-08-17 | 2007-01-10 | LG Electronics Inc. | Method for processing random access in mobile communication system |
| CN1448035A (en) * | 2000-08-21 | 2003-10-08 | 西门子公司 | Method for controlling access in radio communications system |
| CN1450730A (en) * | 2002-04-05 | 2003-10-22 | 欧洲三菱电讯有限公司 | Method of random access to physical random access channel and mobile station implementing said method |
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| 3GPP Organisational Partners.Physical layer procedures (TDD).《3GPP TS 25.224 V7.1.0》.2006, * |
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| WO2009021419A1 (en) | 2009-02-19 |
| CN101102605A (en) | 2008-01-09 |
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