CN101647235A - Connection maintenance in ieee 802. 16 networks with relays via cid encapsulation - Google Patents

Abstract

A method for transmitting data in a wireless network includes generating a packet of data having a connection identification (CID) indicating a connection to a final destination for the packet of data. A desired path for transmitting the packet of data to the final destination is determined. The desired path includes one or more relay stations. The generated packet of data is encapsulated in one or more capsules, each capsule having a CID indicating a connection to one of the one or more relay stations along the desired path. The packet of data is routed along the desired path using the CIDs of the one or more capsules and the packet of data to arrive at the final destination. At each of the one or more relay station, an outer-most capsule having a CID corresponding to the present relay station is stripped from the packet of data.

Description

In IEEE 802.16 networks, safeguard via the connection of CID encapsulation with relaying

Cross reference to related application

The application is based on the provisional application 60/885,930 of provisional application of submitting on November 8th, 2,006 60/857,538 and submission on January 22nd, 2007, and its full content is incorporated into this paper by reference.

Technical field

The disclosure relates to IEEE 802.16 networks, more properly, relates in IEEE 802.16 networks with relaying and safeguarding via the connection of CID encapsulation.

Background technology

Radio communication is a kind of key areas that technology is disposed.Radio communication not only relates to the mobile radio communication network such as GSM and cdma cellular telephone network, and relates to the radio computer network such as IEEE 802.11 Wifi and IEEE 802.16 wireless MANs (MAN) (being also referred to as WiMAX).

In these networks, WiMAX provides the promise to a kind of effective and efficient manner, promptly realizes inserting and need not to make up a large amount of copper line or the fiber optic cables infrastructure that enters family and office to the next generation network of all-purpose computer and communication equipment.And except " last mile " fixed broadband access was provided, for example the WiMAX standard of IEEE 802.16e was provided to the network insertion of the portable terminal that may roam in the area of coverage of network base station.

In this type of mobile WiMAX network, the network insertion of the one or more portable terminals to their area of coverage is realized in a plurality of base stations.When portable terminal leaves the area of coverage of a base station, and when entering the area of coverage of another base station, network insertion may switch to another base station from a base station, wherein has the interruption of little network insertion or does not have the interruption of network insertion fully.

Therefore, mobile WiMAX network can provide to the network insertion of the portable terminal that is used for telecommunications and/or for example to the transfer of data arbitrarily of the connection of internet.

For the area of coverage that enlarges the base station and/or improve signal strength signal intensity in the poor cover part of the area of coverage, can use one or more relay stations.Relay station generally is to monitor and repeat broadcast communication signal and do not consider the simple repeater of the default destination of these signals of communication.Therefore, its a plurality of base stations that have one or more relay stations separately in area of coverage can be inserted so that mobile wireless network to be provided on wide zone in collaborative work.

Though adopt the conventional WiMAX network of conventional relay station that network insertion can be provided, still there is the following demand that continues, when promptly being provided, more reliable network insertion makes the bandwidth efficiency maximization on the bigger area of coverage.

Summary of the invention

A kind of being used for comprises the generation packet in the method for wireless network emission data, and this packet has the connection identifier (CID) of indication about the final destination of this packet.Be identified for packet is transmitted into the expected path of final destination.This expected path comprises one or more relay stations.The packet that generates is encapsulated in one or more capsules (capsule), and each capsule has the CID that is indicated to along unique connection of one or more relay stations of expected path.Use one or more capsules and CID packet along the grouping of expected path route data to arrive the final destination.One or more relay stations each, peel off the outmost capsule that has with to the corresponding CID of the connection of current relay station from packet.

Wireless network can meet one or more IEEE 802.16 standards.The final destination can be a portable terminal.Can determine expected path based on channel quality, quality of signals and/or the load balance measured.Expected path can be a downlink path, and packet can comprise the control data of the uplink path of indicative of desired.Expected path can be held concurrently and is downlink path and uplink path.Packet can with one or more additional packet mutual encapsulation.Capsule and/or packet can have more than a CID.

A kind of method that is used in the data communication of relay station relay wireless comprises and receives the packet that encapsulates in one or more capsules with wireless mode.Each capsule and packet have connection identifier (CID).Outmost capsule is peelled off from packet, thereby disclosed another packet or this packet, disclose CID thus.Packet is transmitted into the CID purpose of indicating ground that is disclosed.

The CID of packet and one or more capsules can be corresponding to the path of determining that is used for packet is transmitted into the final destination.The final destination can be a portable terminal.RFDC can meet one or more IEEE 802.16 standards.Packet can with one or more additional packet mutual encapsulation.Capsule and/or packet can have more than a CID.

A kind of being used for comprises the expected path that is identified for transmit data packet in the method for wireless network emission data.This expected path comprises one or more relay stations.Packet is encapsulated in one or more capsules corresponding with described one or more relay stations.Along the expected path transmit data packet.

Wireless network can meet one or more IEEE 802.16 standards.Packet can comprise connection identifier (CID), and this connection identifier (CID) is indicated to the connection about the final destination of this packet, and each of one or more capsules has the CID of its corresponding relay station of indication.Can be according to CID along the expected path transmit data packet.At each relay station, can peel off outmost capsule from packet with CID corresponding with current relay station.Can determine expected path based on channel quality, quality of signals and/or the load balance measured.

Description of drawings

When considering in conjunction with the accompanying drawings,, will easily obtain the understanding more comprehensively of the disclosure and a plurality of appended aspects thereof and understand them better with reference to hereinafter detailed description, wherein:

Fig. 1 is the figure that illustrates according to the mobile network of example embodiment of the present invention;

Fig. 2 is the flow chart that is used for the method for routing to communicate data between base station and travelling carriage that illustrates according to example embodiment of the present invention;

Fig. 3 is the figure that illustrates according to the packet encapsulation of example embodiment of the present invention;

Fig. 4 is the figure that illustrates according to a plurality of packet encapsulation of example embodiment of the present invention; And

Fig. 5 is the example that illustrates according to the grouping of the embedding of a plurality of destinations of sensing of example embodiment of the present invention.

Embodiment

When the example embodiment of describing shown in the accompanying drawing of the present disclosure, for the sake of simplicity, adopted particular term.But, unintentionally the disclosure is limited to the particular term of selection like this, and should understands each discrete cell and comprise all technical equivalents of working in a similar manner.

Example embodiment of the present invention provides a kind of and is used for by one or more relay stations (RS) method and system of routing to communicate data between base station (BS) and travelling carriage (MS) on one's own initiative.

In IEEE 802.16e network, when the MS initialization, to set up management and connect, this management connects and comprises that the basic management connection is connected with main management.Basic management connects and can be used for the short MAC administrative messag that is pressed for time.Main management connects and can be used for length and MAC administrative messags more delays tolerances.Can use the emission of connection identifier (CID) guide management information and data number between BS and MS.CID is 16 bit digital that are used to manage the emission between BS and the MS.Because data are only launched between BS and MS, so need not the Route Selection of data.

CID can adopt the form of DL-MAP to transmit with data, and DL-MAP comprises the information of the CID in the relevant data burst (burst) of each distribution.By DL-MAP is decoded, MS can discern it should monitor for which burst.Example embodiment of the present invention attempts keeping this functional interoperability to guarantee to be fit to, and therefore guarantees that the data that arrive MS should comprise the correct CID that is used for this MS.

Be arranged in the BS area of coverage and/or centralized multihop relay system in addition at one or more RS, when BS when the path of one or more RS routes data to MS on one's own initiative, can make network insertion more reliable on the bigger area of coverage, simultaneously with the maximizing efficiency of bandwidth.

But, the WiMAX network (for example, meet those of IEEE 802.16e standard) may come addressing by CID number, therefore may be difficult on one's own initiative to come the route data to keep simultaneously and interoperability round the communication system of IEEE 802.16e standard design by the path of one or more RS.Therefore, example embodiment of the present invention attempts providing the path active route data along one or more RS.

Fig. 1 is the schematic diagram according to the mobile network of example embodiment of the present invention.Can be along first path (P1) route first data of determining between base station (BS) and first travelling carriage (MS1), first path of determining (P1) comprises first relay station (RS1) and the 3rd relay station (RS3).Simultaneously, can be along second path (P2) route second data of determining between base station (BS) and second travelling carriage (MS2), second path of determining (P2) comprises RS1 and second relay station (RS2).By route data on one's own initiative, can optimize those the data transmission feature of for example discussing above along the path of determining.

Fig. 2 is the flow chart that example embodiment according to the present invention method of routing to communicate data between base station and travelling carriage is shown.At first, base station (BS) determines to can be used for launching the expectation communication path (step S21) of data.The expectation communication path comprises selection transporting the relay station of data, and wherein down link (when data from BS to MS during along the path movement of selected RS) go up and up link (when data from MS to BS during along the path movement of selected RS) go up the order that data will be propagated between them.Uplink path can be the reverse path of downlink path; But situation is not necessarily like this.Uplink path and downlink path can be determined individually.Therefore, in selecting the expectation communication path, can not only select downlink path but also select uplink path.

The selection of expected path can be determined based on a plurality of factors.For example, the signal quality of the channel quantity of measurement, each connection (QoS), load balance etc.For example factors such as network topology and other situations may change the reasonability of multiple possible path apace, and therefore initiatively the path Route Selection make that BS can be fast and easily adapt to situation in changing to guarantee that reliability and efficient are optimum.

And, determine that expected path can be in conjunction with the unit of discussing in the U.S. Patent application of submitting on August 9th, 2,007 11/835,604, this application has common assignee and common inventor, and its content all is incorporated into this paper by reference.

In next procedure, the data that the base station will be launched are split into grouping (step S22).Can specify CID (step S23) to each packet according to its final destination then, thereby the interoperability with the conventional MS that meets IEEE 802.16 is provided.

Then can be in a series of capsules with each packet encapsulation, each capsule has its CID, this CID sign is along the relay station (step S24) on the path of determining, so that the capsule of the inside and CID represent the last leg on the path from BS to MS, and outmost capsule and CID represent the first stop on the path from BS to MS.

In encapsulation, the grouping of mailing to the target recipient is the pay(useful) load of intermediate node.Relation between the CID of the CID of current group and embedding is not required.

Can send the packet (step S25) of encapsulation then along expected path.Each RS place on the path, each RS peels off outmost capsule and CID, thereby discloses next capsule and CID.These packet propagation are to the specified next RS of CID that discloses then, and wherein this process lasts till till the MS place receives these groupings.On up link, MS can be in a similar manner with the construction packages packet of necessity so that grouping turns back to BS along the uplink path of expectation.

Each relay station can have the scope of a plurality of CID that its monitors or specific CID.Relay station can be configured to monitor its specific CID, then when the grouping of its CID that finds to have setting, it can peel off outmost header information, handling remaining pay(useful) load and utilize the CID that points to next jumping to transmit remaining pay(useful) load, itself also is the grouping of mailing to next recipient.The distribution of each emission uses conventional MAP structure to distribute by BS.

Fig. 3 is the schematic diagram that illustrates according to the packet encapsulation of example embodiment of the present invention.As mentioned above, after BS determines expected path, each packet can be encapsulated in a series of capsules, these capsules have CID, and it is designed to will divide into groups to be delivered to MS from BS along the selected path of RS.If selected path relates to a plurality of intermediate repeater stations, then can be repeatedly with the message encapsulation.Be not certain for each related relay station encapsulating packets.

In the example depicted in fig. 3, selected path comprises RS1, is RS2 then.BS can determine to be used for along the sequence of the CID of selected route guidance grouping then.The routing table 30 of Fig. 3 illustrates along the difference station in the path of determining and can be used for along the CID of the route guidance data of determining.

Then can be with packet encapsulation.At first with data encapsulation in the capsule that comprises corresponding to " the CID A " 38 of the final destination (herein for MS) of grouping.Then with packet encapsulation in the capsule that comprises corresponding to " the CID B " 37 that is grouped in the previous position (being RS2 herein) on the selected path.Then with packet encapsulation in the capsule that comprises corresponding to " the CID C " 36 that is grouped in the previous position (being RS1 herein) on the selected path.

The packet that will encapsulate fully sends to the station that the CID of outmost capsule 36 represents then, is RS1 (step S31) herein.In case, outmost capsule 36 (step S32) is peelled off in grouping at the RS1 place.Then grouping is sent to the station that the CID of new outmost capsule 37 represents, be RS2 (step S33) herein.In case, once more grouping is peelled off outmost capsule 37 (step S34) at the RS2 place.Then grouping is sent to the station that the CID of new outmost capsule 38 represents, be MS (step S35) herein.Therefore, the encapsulation of packet described herein can come the route packet along expected path.

On up link, MS can adopt similar mode to encapsulate the grouping that will send to BS along the uplink path of expectation.Can for example this path be sent to MS from BS by from BS to MS, sending control data.Can adopt similar mode to launch subsequent data packet; But expected path can be according to changing as the situation change of the factor in the Path selection and the position in the MS change.

Therefore, along with the routed path change of specific MS, the route of expectation can change fast and easily by encapsulation.And, because by encapsulation but not tree structure comes route grouping, so need not the fixedly position of RS.Therefore, the related additional overhead of grouping of emission encapsulation provides along the expected path ability of redirected packets apace.Therefore, the method is particularly suitable for launching and confirming the application of administrative messag and other times key.

Can have independent encapsulation corresponding to each jumping on the selected path.For example, some relay stations can be configured to carry out conventional the repetition, and do not monitor specific CID and do not peel off their CID capsule from grouping.Need not to comprise the encapsulation of the CID that contains this relay station via the grouping of this type of relay station route.Therefore, the base station can be adopted the relay station of conventional configuration and be configured to routing packets when passing through expected path by above any combination of the relay station of description ground action.And the base station can indicate relay station to move to satisfy system requirements at that time with ad hoc fashion.Therefore, single relay station can be peelled off between the pattern at normal mode and CID described herein and switch.

In addition, on any level, the capsule with CID can comprise more than a sub-capsule, and each sub-capsule has its CID separately.Similarly, the capsule with CID can comprise more than a data grouping, and each packet has its CID separately.Therefore, a plurality of capsules and/or packet can be propagated together, as long as their paths converge separately.At they stations of separating, path separately, RS can peel off have its CID outmost capsule to disclose two different capsules or two different packets.At this point, capsule that each is different and/or packet can continue to propagate along its path separately.

Fig. 4 is the schematic diagram that illustrates according to a plurality of packet encapsulation of example embodiment of the present invention.In the example of Fig. 4, two data groupings are arranged, plan first packet 49 and second packet 48 of mailing to first travelling carriage (MS1) and second travelling carriage (MS2) respectively.The selected path of two data groupings all is along RS1 and RS2, so part, two paths is overlapping.

In this example, two paths are converged, and to the last one jump, and still, any some place may separate on the path, specifically depends on the current needs of system.Because the expense of sharing of a plurality of groupings of mutual encapsulation is so the base station may be tended to carry out mutual encapsulation under possible situation.And, for can what data of mutual encapsulation grouping and/or sub-capsule without limits.

The routing table 40 of Fig. 4 illustrates along each station and the CID in the path of determining.First packet 49 comprises " CID Z ", and second packet 48 comprises " CID Y ", and these two CID correspond respectively to MS1 and MS2.

Herein, first and second packets 49 and 48 can mutual encapsulation in the single capsule 47 that comprises corresponding to RS2 " CID X ".Capsule 47 is encapsulated in the capsule 46 that comprises corresponding to RS1 " CID W ".

Therefore, the packet of mutual encapsulation can be sent to the represented station of CID of outmost capsule 46, be RS1 (step S41) herein.In case, outmost capsule 46 (step S42) is peelled off in grouping at the RS1 place.Then grouping is sent to the station that the CID of new outmost capsule 47 represents, be RS2 (step S43) herein.In case, once more grouping is peelled off outmost capsule 47 (step S44) at the RS2 place.The grouping 49 and 48 that will separate now sends to their mobile station MS 1 and MS2 (step S45) separately respectively.

Also possible is that the grouping that will embed sends to more than a destination.This can carry out by a plurality of CID are attached in single grouping and/or the capsule.This purpose for for example cooperative relays may be useful, and a plurality of thus relay stations obtain identical data and with these identical data of cooperation way relaying, launch in the time of for example via stack and/or via empty time-code.

Fig. 5 is the example that illustrates according to the grouping of the embedding of a plurality of destinations of sensing of example embodiment of the present invention.Herein, the packet 51 that will have a CID " C " is encapsulated in have two CID capsule 52 of (CID " A " and " B ").This capsule can be received by two stations.

Herein, each base station, relay station and travelling carriage may be embodied as computer system.The base station can comprise computer system, and this computer system operation is used to carry out the software of this paper in conjunction with the function of communication network (for example mobile communications network and/or internet) description.The base station can also comprise the launching tower with one or more antennas.Each relay station can comprise computer system and one or more antenna, and this computer system operation is used to carry out the software of function described herein.Each relay station can be that fix and/or mobile.Portable terminal can be phone, smart phone, PDA, portable computer etc., and can be equipped with the wireless adapter that is used for wireless communication.

For serve exemplary purposes, provide the network that meets IEEE 802.16 standards.It being understood that any mobile network who comprises base station, relay station and portable terminal all can utilize method and system described herein.

Above particular exemplary embodiment is illustrative, not deviating from spirit of the present disclosure or not deviating under the prerequisite of scope of claims, can introduce many variations to these embodiment.For example, can be in the scope of the disclosure and the accompanying claims with the unit and/or the feature combination with one another of different example embodiment and/or replace each other.

Claims (20)

1. method that is used in wireless network emission data comprises:

Generation has the grouping of the data of connection identifier (CID), described connection identifier (CID) indication base station with about being connected between the final destination of the grouping of described data;

Be identified for the grouping of described data is transmitted into the expected path of described final destination, wherein said expected path comprises one or more relay stations;

In one or more capsules, each capsule has the CID that is indicated to along the connection of one of one or more relay stations of described expected path with the packet encapsulation of the data that generated; And

The CID that uses described one or more capsules and groupings described data along the grouping of the described data of described expected path route to arrive described final destination, wherein, peel off the outmost capsule that has with to the corresponding CID of the connection of current relay station from the grouping of described data described one or more relay stations each.

2. the method for claim 1, one or more IEEE 802.16 standards of wherein said wireless networks conform.

3. the method for claim 1, wherein said final destination is a portable terminal.

4. the method for claim 1, wherein said expected path are based on following one or more and determine: the channel quantity of measurement, quality of signals or load balance.

5. the method for claim 1, wherein said expected path is a downlink path, and the grouping of described data comprises the control data of the uplink path of indicative of desired.

6. the method for claim 1, wherein said expected path are held concurrently and are downlink path and uplink path.

7. the method for claim 1 is wherein with the grouping mutual encapsulation of the grouping of described data and one or more additional data.

8. the method for claim 1, the one or more of the grouping of wherein said data and described capsule have more than a CID.

9. method that is used in the data communication of relay station relay wireless comprises:

Receive the grouping that is encapsulated in the data in one or more capsules with wireless mode, the grouping of each capsule and described data has connection identifier (CID);

Peel off outmost capsule from the grouping of described data, thereby disclose the grouping of another data or the grouping of described data, disclose CID thus; And

The grouping of described data is transmitted into the CID purpose of indicating ground that is disclosed.

10. method as claimed in claim 9, the grouping of wherein said data and the CID of described one or more capsules are corresponding to the path of determining that is used for the grouping of described data is transmitted into the final destination.

11. method as claimed in claim 10, wherein said final destination is a portable terminal.

12. method as claimed in claim 9, wherein said RFDC meet one or more IEEE 802.16 standards.

13. method as claimed in claim 9 is wherein with the grouping mutual encapsulation of the grouping of described data and one or more additional data.

14. method as claimed in claim 9, the one or more of the grouping of wherein said data and described capsule have more than a CID.

15. a method that is used in wireless network emission data comprises:

Be identified for launching the expected path of the grouping of data, wherein said expected path comprises one or more relay stations;

With the packet encapsulation of described data in the one or more capsules corresponding with described one or more relay stations; And

Launch the grouping of described data along described expected path.

16. method as claimed in claim 15, one or more IEEE 802.16 standards of wherein said wireless networks conform.

17. method as claimed in claim 15, the grouping of wherein said data comprises connection identifier (CID), described connection identifier (CID) is indicated to the connection about the final destination of the grouping of described data, and each of described one or more capsules has the CID of its corresponding relay station of indication.

18. method as claimed in claim 15 is wherein launched the grouping of described data along described expected path according to described CID.

19. method as claimed in claim 15 wherein at each relay station, is peelled off the outmost capsule that has with to the corresponding CID of the connection of current relay station from the grouping of described data.

20. being based on following one or more, method as claimed in claim 15, wherein said expected path determine: the channel quantity of measurement, quality of signals or load balance.

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