CN101471763A - Method for transmitting time-interval distribution information - Google Patents
Method for transmitting time-interval distribution information Download PDFInfo
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- CN101471763A CN101471763A CNA2007100946136A CN200710094613A CN101471763A CN 101471763 A CN101471763 A CN 101471763A CN A2007100946136 A CNA2007100946136 A CN A2007100946136A CN 200710094613 A CN200710094613 A CN 200710094613A CN 101471763 A CN101471763 A CN 101471763A
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Abstract
The invention discloses a method for transmitting time interval distribution information, which comprises the steps as follows: in the first step, a local side device sends time interval distribution information to a user device in a half-duplex EOC network; time interval distribution information includes one or more than one of quantity, sequencing, initial time, length and finish time of an uplink time interval and/or a downlink time interval within a certain time after the current downlink time interval; or time interval distribution information includes one or more than one of sequencing, initial time, length and finish time of the uplink time interval and/or the downlink time interval within a certain quantity after the current downlink time interval; and in the second step, the user device receives and processes time interval distribution information. The transmission method can send time interval distribution information of the half-duplex EOC network continuously through the local side device, thereby leading the user device to know whether any moment within the time or time interval range forecasted by time interval distribution information belongs to the uplink time interval or the downlink time interval.
Description
Technical field
The present invention relates to transmission of Information method in a kind of half-duplex EOC network.
Background technology
EOC (Ethernet Over Cable) network is the point-to-multipoint framework, see also Fig. 1, a local side apparatus connects a plurality of ustomer premises access equipments by one or more splitters or distributor, local side apparatus is a down direction to the communication of ustomer premises access equipment, and ustomer premises access equipment is a up direction to the communication of local side apparatus.
EOC network using TDM (Time Division Multiplexing, time division multiplexing) uplink communication of a plurality of ustomer premises access equipments of mode control and management, be that local side apparatus is that a plurality of ustomer premises access equipments distribute up timeslice separately, each ustomer premises access equipment can only carry out transmitting uplink data in distributing to the up timeslice of oneself.
Some EOC network is only supported half-duplex (Half Duplex) pattern, and when promptly local side apparatus sent downlink data, any slave unit all can not send upstream data; When certain ustomer premises access equipment sent upstream data, local side apparatus can not send downlink data, and other ustomer premises access equipment can not send upstream data.Alternately occur up period and descending period in the half-duplex EOC network, the up period is made up of the up timeslice of one or more ustomer premises access equipments.
See also Fig. 2, this is the schematic diagram of up-downgoing period in the half-duplex EOC network.Wherein the length of each period all is variable, and the corresponding device of the timeslice that the up period comprised and length also are variable.For example, the 1st up period only comprises the up timeslice of ustomer premises access equipment A, and the 2nd up period comprised the up timeslice of ustomer premises access equipment B and C.
In the existing half-duplex EOC network, local side apparatus only sends the up timeslice information of himself to ustomer premises access equipment, each ustomer premises access equipment is not all known the up timeslice information of other ustomer premises access equipments, does not know whole up period and descending period information yet.
Summary of the invention
Technical problem to be solved by this invention provides a kind of transmission method of time-interval distribution information, and this method can in time be transferred to ustomer premises access equipment by local side apparatus with the assignment information of up-downgoing period of half-duplex EOC network.
For solving the problems of the technologies described above, the transmission method of time-interval distribution information of the present invention comprises the steps:
In the 1st step, in the half-duplex EOC network, local side apparatus is to ustomer premises access equipment transmit time segments assignment information;
Described time-interval distribution information comprises the quantity, sequencing, the initial moment, length of up period in the certain hour after the current descending period and/or descending period, one or more in the finish time;
Perhaps described time-interval distribution information comprises the up period of the some after the current descending period and/or the sequencing of descending period, the initial moment, length, one or more in the finish time;
In the 2nd step, ustomer premises access equipment receives and handles described time-interval distribution information.
As a further improvement on the present invention, in the 1st step of described method, the local side apparatus compartment of terrain repeatedly sends described time-interval distribution information to ustomer premises access equipment, the transmitting time of each time-interval distribution information time that a last time-interval distribution information is predicted or the time segment limit in;
In the 2nd step of described method, ustomer premises access equipment receives and handles each time-interval distribution information.
The transmission method of time-interval distribution information of the present invention, the time-interval distribution information of half-duplex EOC network can be transferred to ustomer premises access equipment by local side apparatus constantly, thus make ustomer premises access equipment understand time that time-interval distribution information is predicted or the time any time in the segment limit belong to up period or descending period.
In the EOC network, because the decay between the different port of the splitter of coaxial cable or distributor is limited, so the uplink communication of certain ustomer premises access equipment is received by other ustomer premises access equipments probably.By the method for the invention, ustomer premises access equipment judges that for the moment that receives data the data that the descending period is received are received, and the data that the up period is received are abandoned.Therefore, the present invention can stop effectively that ustomer premises access equipment receives the uplink communication of other ustomer premises access equipments mistakenly in the EOC network, thereby helps guaranteeing network security.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and Examples:
Fig. 1 is an EOC topology of networks schematic diagram;
Fig. 2 is the schematic diagram of up-downgoing period in the half-duplex EOC network;
Fig. 3 is the basic scheme schematic diagram of the transmission method of time-interval distribution information of the present invention;
Fig. 4 is the improvement project schematic diagram of the transmission method of time-interval distribution information of the present invention;
Fig. 5 is the structural representation of time-interval distribution information of the present invention.
Embodiment
See also Fig. 3, the basic scheme of the transmission method of time-interval distribution information of the present invention comprises the steps:
In the 1st step, in the half-duplex EOC network, local side apparatus is to ustomer premises access equipment transmit time segments assignment information;
This time-interval distribution information comprises the initial moment, length (being the duration of each period), the finish time of 3 periods after the current descending period;
In the 2nd step, ustomer premises access equipment receives and handles described time-interval distribution information.
By above-mentioned basic scheme, ustomer premises access equipment can be learnt the relevant information of 3 periods after the current descending period, thereby can judge that any time in this time range belongs to up period or descending period.
In half-duplex EOC network,, therefore must send in the descending period because time-interval distribution information is to mail to ustomer premises access equipment by local side apparatus.The content of time-interval distribution information can have two kinds of forms, and the first comprises the quantity, sequencing, the initial moment, length of up period in the certain hour after the current descending period and/or descending period, one or more in the finish time.For example, time-interval distribution information among Fig. 3 can comprise the interior time-interval distribution information of 600ms after the current descending period, 600ms after the current descending period just comprises 3 periods, is the up period of 300ms, the descending period of 100ms, the up period of 200ms successively.It two is to comprise the up period of the some after the current descending period and/or the sequencing of descending period, the initial moment, length, one or more in the finish time.For example, the time-interval distribution information among Fig. 3 also can comprise the time-interval distribution information of 3 periods after the current descending period, and 3 periods after the current descending period are the up period of 300ms, the descending period of 100ms, the up period of 200ms successively.
Because up period of half-duplex EOC network comprises the up timeslice of one or more ustomer premises access equipments, therefore described time-interval distribution information can also comprise the quantity, sequencing, affiliated ustomer premises access equipment, the initial moment, length of the up timeslice in each up period, one or more in the finish time.Like this, ustomer premises access equipment just can judge time that described time-interval distribution information is predicted or the time any time in the segment limit send the equipment of data.The equipment that sends data in the descending period must be local side apparatus, then determines to send the equipment of data according to different up timeslices in the up period.
In the 1st step of above-mentioned basic scheme, described time-interval distribution information sends to one or more ustomer premises access equipments by local side apparatus, its transmission has dual mode, each sends once described time-interval distribution information to first local side apparatus to one or more ustomer premises access equipments, and each time-interval distribution information only requires a ustomer premises access equipment to receive.It two is that local side apparatus only sends once described time-interval distribution information to one or more ustomer premises access equipments, and this time-interval distribution information requires one or more ustomer premises access equipments all to be received.
Since time-interval distribution information time of predicting or the time segment limit all begin to calculate from the current descending period, therefore the 1st of above-mentioned basic scheme the step and the 2nd step all require to finish in a descending period, the transmission, reception and the processing that are the period assignment information are all finished in a descending period, and so just being unlikely the information that time-interval distribution information is predicted becomes " past tense ".
In order to allow time-interval distribution information transmit constantly, the present invention has done further improvement to above-mentioned basic scheme, sees also Fig. 4.Improvement project comprises the steps:
In the 1st step, the local side apparatus compartment of terrain repeatedly sends described time-interval distribution information to ustomer premises access equipment, the transmitting time of each time-interval distribution information time that a last time-interval distribution information is predicted or the time segment limit in;
In the 2nd step, ustomer premises access equipment receives and handles each time-interval distribution information.
In the 1st step of above-mentioned improvement project, have two kinds of forms in the described time-interval distribution information, its transmission has dual mode, and these are all identical with basic scheme, and the transmission of each time-interval distribution information, reception and processing all require to finish in a descending period.
In the 1st step of above-mentioned improvement project, the transmitting time of a plurality of time-interval distribution informations or the time spacer segment, the advance notice of each time-interval distribution information time or the time segment limit all be variable.In the preferred case, local side apparatus according to the roughly the same time interval or according to roughly the same period quantity at interval to ustomer premises access equipment transmit time segments assignment information.Described each time-interval distribution information comprises the quantity, sequencing, the initial moment, length of up period in the roughly the same time range and/or descending period, one or more in the finish time; Perhaps described each time-interval distribution information comprises the up period of roughly the same quantity and/or the sequencing of descending period, the initial moment, length, one or more in the finish time.
In the 2nd step of above-mentioned improvement project, when ustomer premises access equipment is not received next time-interval distribution information excessively as yet an included time range of time-interval distribution information, regard as the opposite communication direction of last included period of previous time-interval distribution information.This is according to " the up period of half-duplex EOC network and descending period always alternately occur " this rule, the judgement that ustomer premises access equipment is done.
Under the preferred situation of another kind, each sends once described time-interval distribution information to local side apparatus in each descending period, and each time-interval distribution information comprises the initial moment, length of the up period after the current descending period, one or more in the finish time.Fig. 5 has provided the structural representation of time-interval distribution information in this case, supposes that it is 64 bytes that half-duplex EOC network allows the minimum frame length of ethernet frame, and the structure of this time-interval distribution information comprises from front to back successively so:
● destination address (DA), length are 6 bytes.If each sends once described time-interval distribution information to local side apparatus to one or more ustomer premises access equipments, value is the MAC Address of each ustomer premises access equipment so herein.If local side apparatus only sends once described time-interval distribution information to one or more user sides, value is a broadcast identifier so herein, promptly identifies the value that all ustomer premises access equipments are all received.
● source address (sa), length are 6 bytes, and value is the MAC Address of local side apparatus.
● length/type identifier (Length/Type), length are 2 bytes, and value is 0x8808, and wherein 0x is a hexadecimal number.
● action type sign indicating number (OpCode), length are 2 bytes, and value is 0x0007.
● in the initial moment (UP_STARTTIME) of up period, length is 3 bytes.
● the finish time of up period (UP_ENDTIME), length is 3 bytes.
● filler (Pad), length is 38 bytes, is used to make this time-interval distribution information to satisfy the requirement of the minimum frame length of ethernet frame.
● Frame Check Sequence (FCS, Frame Check Sequence), length is 4 bytes.
Time-interval distribution information as shown in Figure 5, its transmitting time need be considered the reception and the processing delay of network transfer delay and ustomer premises access equipment, will guarantee that just its transmission, reception and processing finish in a descending period.
The fixing half-duplex EOC network of segment length also was applicable to up period and/or descending period adjustable length half-duplex EOC network when the method for the invention not only was applicable to up-downgoing.Transmitting time by the control time-interval distribution information or period quantity at interval, and each time-interval distribution information time of predicting or the time segment limit, the method for the invention can average out between the amount of information that announcement frequency and each announcement are provided.
Claims (10)
1. the transmission method of a time-interval distribution information, it is characterized in that: described method comprises the steps:
In the 1st step, in the half-duplex EOC network, local side apparatus is to ustomer premises access equipment transmit time segments assignment information;
Described time-interval distribution information comprises the quantity, sequencing, the initial moment, length of up period in the certain hour after the current descending period and/or descending period, one or more in the finish time;
Perhaps described time-interval distribution information comprises the up period of the some after the current descending period and/or the sequencing of descending period, the initial moment, length, one or more in the finish time;
In the 2nd step, ustomer premises access equipment receives and handles described time-interval distribution information.
2. the transmission method of time-interval distribution information according to claim 1, it is characterized in that: in the 1st step of described method, the local side apparatus compartment of terrain repeatedly sends described time-interval distribution information to ustomer premises access equipment, the transmitting time of each time-interval distribution information time that a last time-interval distribution information is predicted or the time segment limit in;
In the 2nd step of described method, ustomer premises access equipment receives and handles each time-interval distribution information.
3. the transmission method of time-interval distribution information according to claim 1 and 2, it is characterized in that: the transmission of each time-interval distribution information, reception and processing are all finished in a descending period.
4. the transmission method of time-interval distribution information according to claim 2 is characterized in that: local side apparatus according to the roughly the same time interval or according to roughly the same period quantity at interval to ustomer premises access equipment transmit time segments assignment information.
5. the transmission method of time-interval distribution information according to claim 2 is characterized in that: described each time-interval distribution information comprises the quantity, sequencing, the initial moment, length of up period in the roughly the same time range and/or descending period, one or more in the finish time;
Perhaps described each time-interval distribution information comprises the up period of roughly the same quantity and/or the sequencing of descending period, the initial moment, length, one or more in the finish time.
6. the transmission method of time-interval distribution information according to claim 2, it is characterized in that: when ustomer premises access equipment is not received next time-interval distribution information excessively as yet an included time range of time-interval distribution information, regard as the opposite communication direction of last included period of previous time-interval distribution information.
7. the transmission method of time-interval distribution information according to claim 1, it is characterized in that: the described up period comprises the up timeslice of one or more ustomer premises access equipments, and described time-interval distribution information also comprises the quantity, sequencing, affiliated ustomer premises access equipment, the initial moment, length of the up timeslice in each up period, one or more in the finish time.
8. the transmission method of time-interval distribution information according to claim 1 is characterized in that: in the 1st step of described method, local side apparatus respectively sends time-interval distribution information one time to one or more ustomer premises access equipments; Perhaps local side apparatus only sends time-interval distribution information one time to one or more ustomer premises access equipments, and this time-interval distribution information requires these one or more ustomer premises access equipments all to be received.
9. according to the transmission method of claim 4 or 5 described time-interval distribution informations, it is characterized in that: in the 1st step of described method, local side apparatus sends once described time-interval distribution information in each descending period, and each time-interval distribution information comprises the initial moment, length of the up period after the current descending period, one or more in the finish time.
10. the transmission method of time-interval distribution information according to claim 9, it is characterized in that: described time-interval distribution information is 64 bytes, comprising:
Destination address, length are 6 bytes, and value is the MAC Address or the broadcast identifier of ustomer premises access equipment;
Source address, length are 6 bytes, and value is the MAC Address of local side apparatus;
Length/type identifier, length are 2 bytes, and value is 0x8808, and wherein 0x represents hexadecimal number;
Action type sign indicating number, length are 2 bytes, and value is 0x0007;
In the initial moment of up period, length is 3 bytes;
The finish time of up period, length is 3 bytes;
Filler, length is 38 bytes, makes described time-interval distribution information satisfy the minimum frame length requirement of ethernet frame;
Frame Check Sequence, length are 4 bytes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100946136A CN101471763A (en) | 2007-12-24 | 2007-12-24 | Method for transmitting time-interval distribution information |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100946136A CN101471763A (en) | 2007-12-24 | 2007-12-24 | Method for transmitting time-interval distribution information |
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| CN101471763A true CN101471763A (en) | 2009-07-01 |
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| CNA2007100946136A Pending CN101471763A (en) | 2007-12-24 | 2007-12-24 | Method for transmitting time-interval distribution information |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013178189A2 (en) * | 2012-08-28 | 2013-12-05 | 中兴通讯股份有限公司 | Method, system, end office device, and cpe for adjusting uplink/downlink time allocation |
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2007
- 2007-12-24 CN CNA2007100946136A patent/CN101471763A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013178189A2 (en) * | 2012-08-28 | 2013-12-05 | 中兴通讯股份有限公司 | Method, system, end office device, and cpe for adjusting uplink/downlink time allocation |
| WO2013178189A3 (en) * | 2012-08-28 | 2014-01-23 | 中兴通讯股份有限公司 | Method, system, end office device, and cpe for adjusting uplink/downlink time allocation |
| CN103634086A (en) * | 2012-08-28 | 2014-03-12 | 中兴通讯股份有限公司 | Method for adjusting uplink and downlink time allocation, system, local-side equipment and customer premise equipment (CPE) |
| CN103634086B (en) * | 2012-08-28 | 2018-12-21 | 中兴通讯股份有限公司 | Adjust method, system, local side apparatus and the CPE of the distribution of uplink and downlink time |
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Open date: 20090701 |