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CN100508663C - Method and device for realizing the preferential access to REC at the RE beginning end - Google Patents

Method and device for realizing the preferential access to REC at the RE beginning end Download PDF

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Publication number
CN100508663C
CN100508663C CNB2007100005310A CN200710000531A CN100508663C CN 100508663 C CN100508663 C CN 100508663C CN B2007100005310 A CNB2007100005310 A CN B2007100005310A CN 200710000531 A CN200710000531 A CN 200710000531A CN 100508663 C CN100508663 C CN 100508663C
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port
rec
inserts
assignment
tail end
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CN101009934A (en
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王少瑞
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNB2007100005310A priority Critical patent/CN100508663C/en
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Priority to PCT/CN2008/070053 priority patent/WO2008083625A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The disclosed method to let RE head port preferential access REC comprises: REC adding port attribute field in CPRI frame and evaluates to identify the head and tail ports or failure to send to RE; two ports of RE receives CPRI frame to analyze and obtain the field value for CPRI head and tail port attributes and access way. This invention realizes default accessing REC from head port for RE, and overcomes stability problem led by random access in prior art.

Description

Realize that RE top preferentially inserts the method and apparatus of REC
Technical field
The present invention relates to wireless communication technology field, refer to especially realize in a kind of common radio-frequency interface that RE (Radio Equipment, wireless device) top preferentially inserts the method and apparatus of REC (Radio EquipmentController, radio equipment controller).
Background technology
CPRI (Common Public Radio Interface, the common radio-frequency interface) is 3G (The ThirdGeneration, 3G (Third Generation) Moblie) a kind of standard interface of developing at the unmatched problem of interface between the distinct device manufacturer of base station open interface platform development alliance, it has defined physical layer between REC and the RE and basic data link layer form.As a kind of standard interface of serially concatenated networking, the REC of CPRI definition is the host node in the cascade network, and RE is from node.Wherein, REC links to each other by Iub interface and RNC (Radio Network Controller, radio network controller), and RE is by eating dishes without rice or wine and communications of user equipment; Then connect transmission data, clock and control information etc. between separate REC and the RE by the CPRI physical link.Before setting up normal communication link between REC and the RE, RE must at first insert REC.
The mode that RE inserts REC in the prior art is access way at random.In the ring-shaped network mode is example, and as shown in Figure 1, two ports of ring-shaped network have " top " and " tail end " attribute, and the direction of arrow among the figure shows the access direction of RE.As shown in the figure, RE comprises two ports, and its possible state is " SLAVE " (reception) or " MASTER " (transmission), and wherein the SLAVE state can receive information, and MASTER can send information.RE is changed to the SLAVE state with two ports after startup, to receive the CPRI frame that top and tail end are all sending simultaneously.When RE receives the CPRI frame earlier and obtains effective HOP by parsing from a port, then another port is forced to switch to the MASTER state, and no longer receive the CPRI frame, this RE promptly accesses to REC from top thus.Because the RE on the looped network may receive the HOP that top sends earlier at synchronization, also might receive the HOP that tail end sends earlier, thereby the direction that causes RE to insert REC is at random, promptly may be linked into top and also may be linked into tail end.
RE inserts the mechanism of REC at random there are the following problems in the above-mentioned prior art: if the user is a chain type at the chain link attribute of top configuration, and reality inserts in the looped network mode, then system is each starts or when needing networking again, RE on the ring inserts REC top or tail end with random fashion, when RE inserts top, because top has been configured the chain loop data, this RE can set up communication link with REC; And RE is when inserting tail end, because tail end does not dispose any chain loop data, the RE that therefore inserts tail end can't set up communication link with REC, thereby causes RE can not keep the stable state of proper communication.
Summary of the invention
The purpose of this invention is to provide the method and apparatus that a kind of RE of realization top preferentially inserts REC, insert REC in the prior art at random and cause RE can not keep the problem of stable proper communication to solve.
One embodiment of the present of invention propose the method that a kind of RE of realization top preferentially inserts REC, comprising:
Radio equipment controller REC adds the port attribute field in common radio-frequency interface CPRI frame, and assignment with the sign port be top, tail end or invalid, send to wireless device RE afterwards;
Two ports of described RE all receive the CPRI frame and resolve the assignment of obtaining described port attribute field, if assignment is different and comprise the top sign, then described RE inserts described REC from top; If assignment is different and do not comprise the top sign, then described RE inserts described REC from tail end; If assignment is identical, then described RE inserts described REC at random.
Another embodiment of the present invention proposes a kind of preferential radio equipment controller REC equipment that inserts in wireless device RE top of realizing, comprises at least one port, also comprises common radio-frequency interface CPRI encapsulation unit,
Described CPRI encapsulation unit adds the port attribute field in CPRI frame to be sent, and assignment with identify described port be top, tail end or invalid after encapsulate; CPRI frame after the encapsulation is sent to the RE side by described port.
An embodiment more of the present invention proposes a kind of top of realizing and preferentially inserts the wireless device RE equipment of radio equipment controller REC, comprises two ports, also comprises common radio-frequency interface CPRI resolution unit,
Described CPRI resolution unit is resolved the CPRI frame that described two ports receive, and obtains the assignment and the judgement of port attribute field: if assignment is different and comprise the top sign, then described RE inserts described REC from top; If assignment is different and do not comprise the top sign, then described RE inserts described REC from tail end; If assignment is identical, then described RE inserts described REC at random.
Utilize the present invention to realize that RE top preferentially inserts the method and apparatus of REC, in the CPRI frame that sends, add the port attribute sign by REC, make RE know that effective jumping value is top or the tail end transmission by REC by resolving the CPRI frame, further determine access way, realize that the RE acquiescence inserts REC by top, insert the problem that RE that REC causes can not keep stable proper communication in the prior art at random thereby solved.
Description of drawings
Fig. 1 inserts the ring-shaped network schematic diagram of REC at random for RE in the prior art;
Fig. 2 preferentially inserts the embodiment flow chart of the method for REC for the present invention realizes RE top;
Fig. 3 realizes the preferential REC apparatus embodiments figure that inserts in RE top for the present invention;
Fig. 4 preferentially inserts the RE apparatus embodiments figure of REC for the present invention realizes top.
Embodiment
In conjunction with the accompanying drawings the present invention is further set forth with specific embodiment below.
The invention discloses the method that a kind of RE of realization top preferentially inserts REC, one embodiment may further comprise the steps as shown in Figure 2:
S201, REC add the port attribute field in CPRI frame to be sent.
In order preferentially to be linked into the top of REC, RE must learn that effective HOP value is to send from top or from tail end, thereby how decision inserts.Therefore, need expand, add the port attribute field, shown in the superframe control field structure of table 1CPRI standard frame the CPRI standard frame.
Table 1:
Sub-Channel Number The subchannel purpose Xs＝0 Xs＝1 Xs＝2 Xs＝3
0 Synchronization timing Sync byte K28.5 Hyper Frame Number HFN The BFN-low byte The BFN-high byte
1 Control maintenance channel at a slow speed Control maintenance channel at a slow speed Control maintenance channel at a slow speed Control maintenance channel at a slow speed Control maintenance channel at a slow speed
2 Agreement in layer one band Version number Initialization command Layer one is safeguarded order Pointer p
3 Reserve bytes Reserve bytes Reserve bytes Reserve bytes Reserve bytes
... ... ... ... ... ...
15 Reserve bytes Reserve bytes Reserve bytes Reserve bytes Reserve bytes
16 The self-defined district of manufacturer Local port ID 2ms RTWP The jumping value The reception of port or transmit status
17 The self-defined district of manufacturer The self-defined district of manufacturer The self-defined district of manufacturer The self-defined district of manufacturer The self-defined district of manufacturer
... ... ... ... ... ...
p-1 The self-defined district of manufacturer The self-defined district of manufacturer The self-defined district of manufacturer The self-defined district of manufacturer The port attribute field
Pointer p The quick control maintenance channel The quick control maintenance channel The quick control maintenance channel The quick control maintenance channel The quick control maintenance channel
... ... ... ... ... ...
63 The quick control maintenance channel The quick control maintenance channel The quick control maintenance channel The quick control maintenance channel The quick control maintenance channel
As above shown in the table, 256 interior control words of CPRI superframe are loaded into 64 subchannels, and a sub-channel comprises 4 control words of each superframe.Ns is the index value of subchannel, and scope is 0 to 63, and Xs is the index value of a subchannel inner control word, has 0,1,2,3 four kind of probable value.The control word X=Ns+64*Xs that superframe is interior.
Wherein, the control word of X=0 is the comma byte;
The control word of X=64*Xs (Xs=1,2,3) is used for synchronously and timing;
The control word of X=1+64*Xs (Xs=0,1,2,3) is used to send control and management information for controlling maintenance channel at a slow speed;
The control word of X=2+64*Xs (Xs=0,1,2) is used for agreement in layer one (physical layer) band;
The control word of X=2+64*Xs (Xs=3) is used to indicate the original position of quick control maintenance channel;
X=Ns+64*Xs (Ns=3 ..., 15; Xs=0,1,2,3) control word is a reserve bytes;
Other byte information then are self-defined district of manufacturer and quick control maintenance channel, and the original position of quick control maintenance channel is by the control word decision of X=2+64*3.
From the above mentioned, can in the self-defined district of reserve bytes or manufacturer of CPRI frame, add the port attribute field, the beginning tail end attribute of sign port.As shown in table 1, promptly in the self-defined district of manufacturer, add the port attribute field.
S202, to port attribute field assignment with the sign port be top, tail end or invalid.
After the chain loop data is configured, promptly according to the chain link attribute of configuration respectively to the assignment of the CPRI register configuration port attribute field of the corresponding port of REC.The span that for example can set the port attribute field is 0,1,0xff, and 0 represents top, and 1 represents tail end, and the 0xff representative is invalid.If the chain link attribute configuration of port is top, then the port attribute field of the CPRI frame of this port transmission is assigned 0; If the chain link attribute configuration of port is a tail end, then the port attribute field of the CPRI frame of this port transmission is assigned 1; If this port does not dispose any chain loop data, then the port attribute field is defaulted as 0xff.If REC and RE are ring-shaped network, then REC will dispose top and two ports of tail end, and the CPRI frame that includes top ident value 0 and tail end ident value 1 respectively promptly sends to the RE side by these two ports; If be the alternate manner networking, then REC generally only disposes a transmit port, and can not dispose the beginning tail end attribute of this port, and the assignment of the CPRI frame middle port attribute field of transmission is 0xff.
Two ports of S203, RE all receive the CPRI frame and resolve the assignment of obtaining CPRI frame middle port attribute field.
By prior art as can be known, RE equipment comprises two ports, and its possible state is " SLAVE " or " MASTER ", and wherein the SLAVE state can receive information, and MASTER can send information.After starting, RE two port all can be changed to the SLAVE mode, to receive the CPRI frame that REC sends.If REC and RE are ring-shaped network, then REC will have top and tail end and send the CPRI frame simultaneously, and the RE in the looped network might receive the CPRI frame that top sends earlier, also might receive the CPRI frame that tail end sends earlier.For two ports that guarantee RE all can receive the CPRI frame, after system start-up, can add a time-delay T, for example 100ms carries out the processing of subsequent step to the CPRI frame afterwards again.In addition, cause certain port of RE equipment can't normally receive the CPRI frame for avoiding network link occur to disconnect, so that finally cause inserting the problem of REC, it is invalid that the CPRI frame port attribute field assignment that RE acquiescence initial port receives can be set.Can guarantee promptly by above-mentioned time-delay and initial default setting that two ports of all RE all can receive the CPRI frame in the looped network and preferentially insert REC to realize follow-up top.
S204, judge whether the assignment of the CPRI frame middle port attribute field that two ports receive is identical, if identical then RE inserts REC at random, otherwise would change step S205;
When RE and REC ring-shaped network, because two ports of RE are all in accepting state, therefore may receive the CPRI frame that the port attribute assignment is identical or different, if problem identical then that do not exist top preferentially to insert, so could RE would be inserted REC by existing random fashion.Adopt non-ring-likely in addition at RE and REC, for example when chain, tree group network, then there is not the configuration of the tail end that begins in the port of REC, and promptly the port attribute field assignment of CPRI frame is 0xff, and this moment, RE also adopted random fashion to insert REC.
S205, continuation judge whether comprise the top sign in the different CPRI frame of assignment, if then insert REC from top, otherwise insert REC from tail end;
When REC and RE are ring-shaped network, the CPRI frame that carries beginning, tail end ident value sends to the RE side by top and the tail end of REC respectively, utilize the transparent transmission mechanism of RE, through behind the time-delay T described in the step S203, two of all RE ports all will receive the CPRI frame that comprises top ident value and tail end ident value respectively in the looped network under the normal condition; By the parsing of above-mentioned steps S203, then RE obtains effective HOP value from the CPRI frame that comprises the top ident value that receives, and the another one port is switched to the MASTER state, realizes that thus RE top accesses to REC.If occurring link in the looped network disconnects, then RE is because the initial default settings of process step S203, be respectively tail end and invalid or top and invalid situation so the CPRI frame port attribute field assignment that two ports receive may occur, then RE accesses to REC by above-mentioned similar method correspondence from tail end or top.
The present invention has realized promptly that by the step of the foregoing description RE preferentially inserts REC from top, from the above, the present invention realizes that method that RE top preferentially inserts REC is mainly used in but is not limited to the system environments of ring-shaped network, and realize that by using the present invention RE top preferentially inserts the method for REC, no matter whether the beginning tail end of REC has disposed the chain loop data, can guarantee system each start or again during networking all RE all give tacit consent to preferentially and access to REC from top, thereby avoid that RE inserts REC at random and causes the problem that can not keep the stable normal communication state of RE in the prior art.
The invention also discloses the preferential REC equipment that inserts in a kind of RE of realization top, one embodiment comprises port 311,312 and CPRI encapsulation unit 321,322 as shown in Figure 3.Wherein, CPRI encapsulation unit 321,322 adds the port attribute field in CPRI frame to be sent, and assignment with the sign port be top, tail end or invalid after encapsulate; CPRI frame after the encapsulation is sent to the RE side by port 311,312.
CPRI encapsulation unit 321,322 adds the port attribute field by the self-defined district of reserve bytes in the extension standards CPRI frame or manufacturer, the span that for example can set the port attribute field again is 0,1,0xff, 0 represents top, and 1 represents tail end, and the 0xff representative is invalid.Further, the CPRI encapsulation unit is configured according to the chain link attribute of port 311,312 assignment to the port attribute field respectively: if the chain link attribute configuration of port is top, then the port attribute field is composed with top ident value 0; If the chain link attribute configuration of port is a tail end, then the port attribute field is composed with tail end ident value 1; If port does not dispose the chain link attribute, then the port attribute field is composed with invalidated identification value 0xff.If REC and RE are ring-shaped network, then REC generally will dispose top and two ports of tail end, and the CPRI frame that includes top ident value 0 and tail end ident value 1 respectively promptly sends to the RE side by these two ports; If be the alternate manner networking, then REC generally only disposes a transmit port, and can not dispose the beginning tail end attribute of this port, and the assignment of the CPRI frame middle port attribute field of transmission is 0xff.The REC of present embodiment during promptly with ring-shaped network is configured to example, the CPRI frame that then carries beginning, tail end attribute-bit value is sent to the RE side by port 311,312 respectively again, and the RE side can be learnt the beginning tail end attribute of CPRI frame transmit port by the port attribute field in the parsing CPRI frame.
Disclosing a kind of top of realizing preferentially inserts the RE equipment of REC in addition in the present invention, and one embodiment comprises port 411,412 as shown in Figure 4, comprises that also CPRI resolution unit 420 and port are provided with unit 430.Wherein, port 411,412 is provided with unit 430 by port and is set to accepting state to receive the CPRI frame that the REC side sends behind the RE device start, simultaneously port is provided with unit 430 the CPRI frame port attribute field assignment that two ports, 411,412 acquiescences initially receive is set is invalid, disconnects and causes certain port of RE can not receive that the CPRI frame finally causes inserting the problem of REC to avoid occurring in the network link; The CPRI frame that 420 pairs of ports of CPRI resolution unit 411,412 receive is resolved, and obtains the assignment and the judgement of port attribute field: if assignment is different and comprise the top sign, then RE inserts REC from top; If assignment is different and do not comprise the top sign, then RE inserts REC from tail end; If assignment is identical, then RE inserts REC at random.
When REC and RE were ring-shaped network, following two ports 411,412 of normal condition will receive the CPRI frame that comprises top ident value and tail end ident value respectively.If REC and RE be with other form networkings, the beginning tail end attribute that REC generally can configured port then; When perhaps occurring abnormal conditions such as disconnection in the network link, comprise the invalidated identification value in the CPRI frame port attribute field that all may cause RE to receive.Wherein, the assignment that two ports 411,412 receive CPRI frame middle port attribute field can be divided into identical or different two kinds of situations, if identical then do not have the preferential problem that inserts in top, RE promptly inserts REC by prior art with random fashion.Port 411, the 412 assignment differences that receive CPRI frame middle port attribute field then comprise top and tail end, top and invalid, tail end and invalid three kinds of situations, if the above two then RE preferentially insert REC from top, receiving the CPRI frame that comprises the top sign with port 411 is example, RE inserts REC from top specific implementation is: CPRI resolution unit 420 is obtained effective jumping value from continuous parsing of CPRI frame relay that port 411 receives, and by port unit 430 is set port 412 is forced to switch to the MASTER transmit status, this RE promptly accesses to REC by SLAVE port 411 from top thus; If last a kind of tail end and invalid situation, then RE accesses to REC by the SLAVE port from tail end by above-mentioned similar method.Realized promptly that by this RE equipment top preferentially accesses to REC.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.

Claims (10)

1, a kind of RE of realization top preferentially inserts the method for REC, it is characterized in that, comprising:
Radio equipment controller REC adds the port attribute field in common radio-frequency interface CPRI frame, and assignment with the sign port be top, tail end or invalid, send to wireless device RE afterwards;
Two ports of described RE all receive the CPRI frame and resolve the assignment of obtaining described port attribute field, if assignment is different and comprise the top sign, then described RE inserts described REC from top; If assignment is different and do not comprise the top sign, then described RE inserts described REC from tail end; If assignment is identical, then described RE inserts described REC at random.
2, realize that according to claim 1 RE top preferentially inserts the method for REC, it is characterized in that described assignment further comprises with the sign port:
According to the chain link attribute of the port of described REC assignment to the described port attribute field of the CPRI of described port correspondence register configuration,
If the chain link attribute configuration of described port is top, then described port attribute field is composed with the top ident value;
If the chain link attribute configuration of described port is a tail end, then described port attribute field is composed with the tail end ident value;
If described port does not dispose the chain link attribute, then described port attribute field is composed with the invalidated identification value.
3, realize that according to claim 1 RE top preferentially inserts the method for REC, it is characterized in that, also comprise before the described reception CPRI frame:
Start described RE and two ports all are set to accepting state, and the port attribute field assignment that the initial CPRI frame of described port is set is invalid.
4, realize that according to claim 1 RE top preferentially inserts the method for REC, it is characterized in that, described RE from top/tail end inserts REC and further comprises:
Described RE obtains effective jumping value from the CPRI frame that comprises top/tail end sign that first port receives, and second port is switched to transmit status.
5, realize that according to claim 1 RE top preferentially inserts the method for REC, it is characterized in that, utilize the self-defined district of reserve bytes or manufacturer in the described CPRI frame to add described port attribute field.
6, a kind of preferential radio equipment controller REC equipment that inserts in wireless device RE top of realizing comprises at least one port, it is characterized in that, also comprises common radio-frequency interface CPRI encapsulation unit,
Described CPRI encapsulation unit adds the port attribute field in CPRI frame to be sent, and assignment with identify described port be top, tail end or invalid after encapsulate; CPRI frame after the encapsulation is sent to the RE side by described port.
As realizing the preferential REC equipment that inserts in RE top as described in the claim 6, it is characterized in that 7, described CPRI encapsulation unit is according to the assignment of the described port attribute field of chain link attribute configuration of described port,
If the chain link attribute configuration of described port is top, then described port attribute field is composed with the top ident value;
If the chain link attribute configuration of described port is a tail end, then described port attribute field is composed with the tail end ident value;
If described port does not dispose the chain link attribute, then described port attribute field is composed with the invalidated identification value.
8, a kind of top of realizing preferentially inserts the wireless device RE equipment of radio equipment controller REC, comprises two ports, it is characterized in that, also comprises common radio-frequency interface CPRI resolution unit,
Described CPRI resolution unit is resolved the CPRI frame that described two ports receive, and obtains the assignment and the judgement of port attribute field: if assignment is different and comprise the top sign, then described RE inserts described REC from top; If assignment is different and do not comprise the top sign, then described RE inserts described REC from tail end; If assignment is identical, then described RE inserts described REC at random.
9, preferentially insert the RE equipment of REC as realization top as described in the claim 8, it is characterized in that, comprise that also port is provided with the unit, then described RE from top/tail end inserts REC and comprises:
Described CPRI resolution unit is obtained effective jumping value from the CPRI frame that comprises top/tail end sign that first port receives; Described port is provided with the unit second port is switched to transmit status.
10, preferentially insert the RE equipment of REC as realization top as described in the claim 9, it is characterized in that, described port is provided with the unit and behind described RE device start described two ports all is set to accepting state, and the port attribute field assignment that the initial CPRI frame of described port is set is invalid.
CNB2007100005310A 2007-01-11 2007-01-11 Method and device for realizing the preferential access to REC at the RE beginning end Active CN100508663C (en)

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PCT/CN2008/070053 WO2008083625A1 (en) 2007-01-11 2008-01-09 A method for realizing preferential access of wireless device to the original end of a wireless device controller wireless device

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JP5131026B2 (en) * 2008-05-20 2013-01-30 富士通株式会社 WIRELESS BASE STATION SYSTEM, CONTROL DEVICE AND WIRELESS DEVICE
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CN102158461B (en) * 2011-03-04 2014-01-08 华为技术有限公司 Method and device for transmitting non-I (in-phase)/Q (quadrature phase) data through common public radio interface (CPRI)
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