CN1863379A - Relay apparatus and system for implementing fast switching - Google Patents
Relay apparatus and system for implementing fast switching Download PDFInfo
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- CN1863379A CN1863379A CNA200510082808XA CN200510082808A CN1863379A CN 1863379 A CN1863379 A CN 1863379A CN A200510082808X A CNA200510082808X A CN A200510082808XA CN 200510082808 A CN200510082808 A CN 200510082808A CN 1863379 A CN1863379 A CN 1863379A
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Abstract
本发明涉及一种中转设备及实现快速切换的系统。本发明主要是在无线接入网络中引入具有中转功能的中转用户站、无线中转基站、有线中转基站和/或有线无线综合中转基站，从而实现无线接入网络中切换前后基站之间的可靠通信。因此，本发明不仅可以有效降低无线通信系统中切换延时，提高无线通信系统的效率。同时，本发明还可以在相邻基站的R8有线连接出现故障时，还可以通过所述中转设备保证切换过程的持续进行，从而可以有效提高无线通信系统的通信可靠性。The invention relates to a transfer device and a system for realizing fast switching. The present invention mainly introduces a relay user station, a wireless relay base station, a wired relay base station and/or a wired and wireless integrated relay base station with a relay function in the wireless access network, so as to realize reliable communication between the base stations before and after switching in the wireless access network . Therefore, the present invention can not only effectively reduce the switching delay in the wireless communication system, but also improve the efficiency of the wireless communication system. At the same time, the present invention can also ensure the continuation of the switching process through the transfer device when the R8 wired connection of the adjacent base station fails, thereby effectively improving the communication reliability of the wireless communication system.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a transfer device and a system for realizing quick switching.
Background
IEEE 802.16 is the first broadband wireless access standard, which mainly includes two versions: one is the broadband fixed wireless access version of the 802.16 standard, referred to as "16 d" for short; another is the broadband mobile radio access version of the 802.16 standard, abbreviated "16 e". The standard defines only the physical layer and the data link layer, also known as the MAC layer, of the base station and the subscriber station. The MAC layer is further divided into a service-specific convergence sublayer, a MAC common part sublayer, and an encryption sublayer.
WiMAX Forum NWG (worldwide interoperability for microwave access Forum network working group) defines a network based on IEEE 802.16.
The IEEE 802.16 based network defined by WiMAX Forum NWG consists of ASN (access network) and csn (csn) of WiMAX system. Wherein, the ASN may connect the WiMAX base station to the ASN GW (ASN gateway) to form a centralized WiMAX access network, as shown in fig. 1; a distributed WiMAX access network may be formed by only WiMAX base stations, and in this case, fig. 1 does not have ASNGW.
A reference point between WiMAX base stations is defined as R8, and cell switching can be carried out between adjacent base stations through R8; the reference point between the WiMAX base station and the ASN GW is defined as R6, and the reference point between the ASN and CSN is defined as R3.
As defined by the 802.16 standard, the 802.16 system structure is shown in fig. 2, and its base station can only be connected with SS (subscriber station) in a wireless manner, so the interconnection between base stations in the WiMAX network architecture can only be realized by wire, and when the number of base stations is large, the wire connection will be complicated.
When the adjacent base stations cannot support R8 wired connection, for example, two adjacent base stations are in different islands respectively, or R8 wired connection of the adjacent base stations fails, R8 handover cannot be supported. At this time, for a centralized WiMAX access network, R6 switching must be adopted between adjacent base stations; for a distributed WiMAX access network, R3 handover must be used between adjacent base stations. Since the R6 path, especially the R3 path, is more complex than the R8 path, both switching alternatives will necessarily result in a larger switching delay.
In addition, for other wireless networks, such as GSM or 3G, reference points between base stations like R8 are not defined, and only handover like R6 or R3 can be performed, resulting in a large handover delay and a serious impact on the communication performance of the wireless communication system.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a relay device and a system for implementing fast handover, so as to ensure that a user terminal in a radio access network can rapidly implement handover between adjacent base stations.
The purpose of the invention is realized by the following technical scheme:
the invention provides a transfer device, comprising:
a transmission processing unit: the communication can be respectively established with a group of base station equipment, and the information interaction is carried out between the base station equipment and each base station equipment;
a switching unit: and the base station equipment is used for sending the signal received by the transmission processing unit and sent by the base station equipment to the corresponding base station equipment through the transmission processing unit.
The transfer device at least comprises one transmission processing unit, and the transmission processing unit comprises: a wireless transmission processing unit and a wired transmission processing unit.
The transmission processing unit comprises:
physical layer transmission unit: respectively communicating with a data link layer and a physical layer transmission unit in a base station which can communicate with the data link layer;
data link layer transmission unit: the communication is carried out between the base station which can communicate with the physical layer transmission unit and the other link layer transmission unit through the switching unit.
The switching unit is connected between the physical layer transmission unit and the data link layer transmission unit, or is arranged on the data link layer and is only connected with the data link layer transmission unit, or can be arranged above the data link layer and is connected with the processing unit of the corresponding layer.
The transfer device further comprises:
the subscriber station processing unit: the user terminal communicates with the base station through the user station processing unit and the wireless transmission processing unit, and/or the user station processing unit communicates with the base station directly through the wireless transmission processing unit;
or,
a base station processing unit: and the base station processing unit and the wireless/wired transmission processing unit are used for communicating with the subscriber station.
In the invention, when the wireless transfer equipment comprises a base station processing unit, the exchange unit is also communicated with the base station in the system through a wired transmission processing unit and a communication cable.
The invention also provides a system for realizing the quick switching, which comprises a transfer device and the base stations before and after the user terminal is switched, wherein the base stations before and after the switching are communicated with each other through the transfer device.
In the system, when the relay device includes a base station processing unit, the relay device further communicates with a subscriber station in the system through wireless connection, and the relay device further includes a wired transmission processing unit for connecting with a previous-stage device.
In the system, when the relay device includes a subscriber station processing unit, the relay device is further in wireless connection communication with a subscriber terminal in the system.
The system comprises:
a relay device comprising a subscriber station processing unit and/or a relay device comprising a base station processing unit.
The transfer device communicates with two base stations with the same mode but different application frequency bands through wireless connection, or communicates with two base stations working in time-sharing mode with the same frequency, or communicates with two base stations working in the same frequency band through different sub-channels, sub-carrier groups or directional antennas with enough isolation.
The transfer device is fixedly or movably arranged in the wireless communication system.
The base stations in the system for realizing the quick switching are communicated with each other through a transfer network which is composed of a plurality of transfer devices and has any topological structure.
According to the technical scheme provided by the invention, the switching information interaction processing of the user terminal between different base stations is realized through the transfer equipment based on wireless transmission, so that the switching delay in the wireless communication system is effectively reduced, and the efficiency of the wireless communication system is improved.
Meanwhile, when the R8 wired connection of the adjacent base station fails, the invention can ensure the continuous switching process through the transfer equipment, thereby effectively improving the communication reliability of the wireless communication system.
Drawings
Fig. 1 is a schematic diagram of a radio access network architecture;
fig. 2 is a diagram illustrating a connection structure between a base station and a subscriber station;
fig. 3 is a schematic diagram of a radio access network structure incorporating RSS;
FIG. 4 is a schematic diagram of a two-transceiver layer two RSS architecture;
FIG. 5 is a diagram of a single transceiver layer two RSS architecture;
FIG. 6 is a schematic diagram of a RSS architecture for a dual transceiver layer;
FIG. 7 is a diagram of a single transceiver layer-RSS architecture;
fig. 8 is a schematic diagram of a radio access network architecture incorporating a wireless RBS 1;
fig. 9 is a schematic diagram of a radio access network architecture incorporating a wireless RBS 2;
FIG. 10 is a diagram of a multi-transceiver layer two RBS architecture;
FIG. 11 is a diagram of a single transceiver layer two RBS architecture;
FIG. 12 is a diagram of a multi-transceiver layer-RBS architecture;
FIG. 13 is a diagram of a single transceiver layer-RBS architecture;
fig. 14 is a schematic diagram of a radio access network architecture incorporating a wired RBS;
fig. 15 is a schematic diagram of a layer two wired RBS architecture;
FIG. 16 is a schematic diagram of a layer one wired RBS architecture;
fig. 17 is a schematic view of a radio access network architecture incorporating a wired-wireless integrated RBS 1;
fig. 18 is a schematic diagram of a radio access network architecture incorporating a wired-wireless integrated RBS 2;
fig. 19 is a schematic view of the structure of a layer two wired-wireless integrated RBS 1;
fig. 20 is a schematic diagram of the structure of a layer two wired-wireless integrated RBS 2.
Detailed Description
The core of the invention is to introduce the transfer equipment into the wireless access network, thereby realizing the switching process between the adjacent base stations in the wireless access network reliably and timely.
Specifically, a subscriber Station (RSS) with a Relay function or a base Station (RBS) with a Relay function is introduced into a radio access network to solve the problem of handover processing between neighboring base stations. For example, the problem that when the adjacent base station cannot support the wired connection or the wired connection of the adjacent base station fails, the switching delay may be large is solved.
When the transfer equipment provided by the invention comprises the wireless transmission processing unit, the realization of the invention can also simplify the wired connection between the base stations when the number of the base stations is larger.
The present invention will be described in further detail with reference to practical applications.
First, the present invention will be described by taking an example of introducing a relay subscriber station with a relay function in a wireless network architecture to support wireless connection between adjacent base stations.
As shown in fig. 3, when a mobile terminal SS2 enters a cell of base station BS1 from a cell of base station BS2, SS2 can establish an R8 path through a transit subscriber station RSS1, thereby completing an R8 handover. Multi-hop RSS can also be introduced between adjacent base stations to establish R8 paths. A relay network consisting of a plurality of RSSs in any topology structure can be introduced between adjacent base stations to establish an R8 path.
RSS can also be used to access subscriber stations outside the coverage of a base station to extend the access radius of the base station, e.g., see fig. 3, with SS3 outside the coverage of BS3, but SS3 gaining access to BS3 through RSS 2.
The subscriber station with the relay function may be fixed or mobile, and may itself serve as a subscriber station. The network access and initialization procedure of the subscriber station with the relay function may be identical to that of the general subscriber station.
The RSS in the invention can be a layer one transfer station, a layer two transfer station, or even a layer three or more transfer stations.
The RSS mainly comprises a switching unit and one or two wireless transceivers, wherein the wireless transceivers are wireless transmission processing units and specifically comprise a wireless physical layer transmission unit and a wireless data link layer transmission unit. Switching elements of RSS are used for data exchange between different base stations (or RBSs) (to support relay functions), between a base station (or RBS) and a user station, and between a base station (or user station) and a user.
RSS uses dual radio transceivers to support the case where BS1 (or RBS) and BS2 (or subscriber station) operate in different frequency bands.
RSS uses a single radio transceiver to support the case where BS1 (or RBS) and BS2 (or subscriber station) are operating in the same frequency band. The BS1 and BS2 can establish communication with RSS transceivers in the same frequency band through different burst packets (bursts) or different frames (frames) in time; the BS1 (or RBS) and BS2 (or subscriber station) can also operate simultaneously, and the RSS radio transceiver communicates with BS1 (or RBS) and BS2 (or subscriber station) in the same frequency band through different sub-channels (subchannels), sub-carrier (subcarrier) groups, or directional antennas with sufficient isolation.
The RSS structure of the present invention is shown in fig. 4 to 7, and specifically includes a layer two-transceiver RSS, a layer two-transceiver RSS and a layer one-transceiver RSS, which will be described below.
The (one) layer two transceiver RSS system architecture is shown in fig. 4:
specifically, it includes a wireless transceiver 1 and a wireless transceiver 2, and establishes wireless communication with base stations BS1 and BS2 before and after handover, respectively. In the application scenario shown in fig. 3, data sent by the user terminal to BS2 is exchanged to wireless transceiver 2 through the switching unit and then transmitted to BS2 through the wireless channel, or vice versa; the handoff related message from BS2 to BS1 is received from radio transceiver 2, switched to radio transceiver 1 through the switching unit, and transmitted to BS1 through the radio channel, and vice versa.
The (second) layer two single transceiver RSS system architecture is shown in fig. 5:
it only includes the wireless transceiver 1, and the base stations BS1 and BS2 before and after the handover establish communication with the wireless transceiver 1, respectively, in this case, the switching unit may be considered to be built in the transceiver. Still taking the application scenario shown in fig. 3 as an example, the data sent by the user terminal to the BS2 is processed by the wireless data link layer and then delivered to the wireless transceiver 1, and then is transmitted to the BS2 by the wireless channel, and vice versa; the handoff related message from BS2 to BS1 is received from wireless transceiver 1, processed by the radio data link layer, and then returned to wireless transceiver 1 and then transmitted to BS1 via the radio channel, or vice versa.
The (three) layer two transceiver RSS system architecture is shown in fig. 6:
for the wireless data link layer with the encryption sublayer, the encryption sublayer function should be stripped from the wireless data link layer and placed between the switching unit and the wireless physical layer processing unit, because the switching unit can only process plaintext and cannot process ciphertext. The structure of the layer-two-transceiver RSS comprises a wireless receiver 1 and a wireless receiver 2, wherein the two receivers share the same wireless data link layer transmission unit to communicate with a user, but establish communication with the BS1 and the BS2 before and after switching through different wireless physical transmission layers respectively. Still taking the application scenario shown in fig. 3 as an example, the data sent by the user to BS2 is exchanged to wireless transceiver 2 through the switching unit and then transmitted to BS2 through the wireless channel, and vice versa; the handoff related message from BS2 to BS1 is received from radio transceiver 2, switched to radio transceiver 1 through the switching unit, and transmitted to BS1 through the radio channel, and vice versa.
The (four) layer one single transceiver RSS system architecture is shown in fig. 7:
for the wireless data link layer with the encryption sublayer, the encryption sublayer function should be stripped from the wireless data link layer and placed between the switching unit and the wireless physical layer processing unit. The layer-one single transceiver RSS only includes the wireless transceiver 1, and specifically includes a corresponding wireless physical layer transmission unit and a wireless data link layer transmission unit, the BS1 and the BS2 before and after the handover are intercommunicated only by the wireless physical layer transmission unit, and the corresponding switching unit may be considered to be built in the wireless physical layer transmission unit, so as to implement the direct connection of the BS1 and the BS 2. In the application scenario shown in fig. 3, data sent by the user to BS2 is processed by the wireless data link layer and then handed to wireless transceiver 1, and then sent to BS2 by the wireless channel, or vice versa; the handoff-related message sent by BS2 to BS1 is received from transceiver 1 and then transmitted by transceiver 1 to BS1 over a wireless channel, and vice versa.
In the invention, switching transfer can be realized by adopting RSS of layer three or more, routing selection can be specifically carried out by utilizing layer three, and communication filtering of layer three or more can be carried out in order to reduce unnecessary transfer flow or safety factors. The structure is similar to the layer two RSS, the difference is that the wireless transceiver of the layer three or more RSS comprises a wireless physical layer, a wireless data link layer and a layer three or more processing unit, and the switching unit is replaced by a wireless routing unit.
Then, the present invention will be described by taking an example of introducing a relay base station with a relay function in a wireless network architecture to support wireless connection between adjacent base stations.
As shown in fig. 8, the present invention may also introduce a base station with a wireless relay function in a wireless network architecture to support wireless connection between adjacent base stations. In fig. 8, when a mobile terminal SS2 enters a BS1 cell from a BS2 cell, an SS2 can establish an R8 path through a radio relay RBS1, thereby completing an R8 handover. Multi-hop wireless RBSs may also be introduced between adjacent base stations to establish the R8 path. A transit network consisting of a plurality of radio RBSs in any topology can also be introduced between adjacent base stations to establish the R8 path.
A subscriber station RSS with relay function can also be introduced between the base station BS2 and the base station RBS with wired relay function, as shown in fig. 9.
The base station with the wireless relay function may be fixed or mobile, and may itself serve as a base station. The radio RBS may be a layer one relay, a layer two relay, or even a layer three or more relay. A radio RBS also mainly consists of one switching unit and one or several radio transceivers. The radio RBS switching units are used for data exchange between different base stations (or RBSs) (to support a relay function) and between a base station and a subscriber station (or RSS). For centralized wireless networks, the wireless RBS also requires a wired transmission processing unit to connect via a wired cable to a higher-level device, which may be a base station controller, or a WiMAX access server (ASN GW).
The radio RBS uses multiple radio transceivers to support the situation where each BSj (or RBSj) and the subscriber station SSi (or RSSi) of the RBS operate in different frequency bands.
The radio RBS uses a single radio transceiver to support the situation where the individual BSj (or RBSj) and the subscriber station Ssi (or RSSi) of the RBS operate in the same frequency band. BSi (or RBSi) accesses a radio RBS in the form of a subscriber station; each BSj (or RBSj) can be in time division with the RBS wireless transceiver through different burst packets (burst) or different frames (frame) to establish reliable communication in the same frequency band; each BSj (or RBSi) can also work simultaneously, and the RBS wireless transceiver is communicated with each BSi (or RBSi) in the same frequency band through different sub-channels (sub-channels), sub-carrier (sub-carrier) groups and directional antennas or intelligent antennas with enough isolation.
The radio RBS system may also have a structure that combines the two cases: one radio transceiver supports several base stations operating in the same frequency band, and the other radio transceivers support other base stations operating in different frequency bands.
The structure of the radio RBS according to the present invention is shown in fig. 10 to 13, and specifically includes a layer two multi-transceiver RBS, a layer two single-transceiver RBS, a layer one multi-transceiver RBS, and a layer one single-transceiver RBS, which will be described below.
The (one) layer two multi-transceiver wireless RBS system structure is shown in fig. 10:
the RBS architecture comprises: the system comprises a group of wireless transceivers and a switching unit, wherein the group of wireless transceivers is used for communicating with a group of base stations and a group of subscriber stations, and the switching unit is used for exchanging information between the subscriber stations and the base stations and between the base stations and the base stations; the RBS also comprises a wired transmission processing unit which is used for communicating with the upper-level equipment. In the application scenario shown in fig. 8, after the data sent by the SS of BS1 to the CSN is received from wireless transceiver 1, the data is switched by the switching unit to the wired transmission processing unit for processing; the handoff related message from BS2 to BS1 is received from radio transceiver 2, switched to radio transceiver 1 through the switching unit, and transmitted to BS1 through the radio channel, and vice versa.
The structure of a layer two single transceiver radio RBS system is shown in fig. 11:
in fig. 11, the structure of the RBS comprises only one radio transceiver, and also comprises corresponding radio physical layer transmission units and radio data link layer transmission units. In the scenario shown in fig. 8, after receiving data sent by the SS of the BS1 to the CSN from the wireless transceiver 1, the data sequentially passes through the wireless physical layer transmission unit and the wireless data link layer transmission unit, and is exchanged by the exchange unit to the wired transmission processing unit for processing; the handover-related message sent by BS2 to BS1 is received from wireless transceiver 1, and then passes through the phy layer transmission unit and the rlc layer transmission unit in turn, and is switched back to wireless transceiver 1 through the switching unit, and then is sent to BS1 through the wireless channel, and vice versa.
Layer (three) -layer-multiple transceiver wireless RBS system architecture as shown in fig. 12:
the structure of the RBS shown in fig. 12 comprises a set of transceivers, but unlike the RBS shown in fig. 10, only one radio data link layer transmission unit is included in the RBS. In the application scenario shown in fig. 8, after receiving data sent by the SS of the BS1 to the CSN from the wireless transceiver 1, the data is exchanged to the wireless data link layer transmission unit and processed by the wired transmission processing unit through the corresponding wireless physical layer transmission unit and the switching unit; the handover related message sent by BS2 to BS1 is received from radio transceiver 2, and then is exchanged to radio transceiver 1 via the phy transport unit and the switch unit in turn, and then is sent to BS1 via the radio channel, or vice versa.
The (four) layer one single transceiver wireless RBS system architecture is shown in fig. 13:
the RBS shown in fig. 13 comprises only one transceiver and the switching unit is connected between the wireless physical layer transmission unit and the wireless data link layer transmission unit. In the application scenario shown in fig. 8, after receiving data sent by the SS of the BS1 to the CSN from the wireless transceiver 1, the data is exchanged to the wired transmission processing unit sequentially through the wireless physical layer transmission unit, the switching unit, and the wireless data link layer transmission unit to be processed; the handover-related message sent by BS2 to BS1 is received from wireless transceiver 1, then switched back to wireless transceiver 1 via the rlc pdu and switch unit, and then transmitted to BS1 via the radio channel, or vice versa.
The layer three or more wireless RBSs can use layer three for routing, and can also filter communication of layer three or more for reducing unnecessary transit flow or safety factor. The structure is similar to the layer two RBS, and the difference is that the wireless transceiver of the RBS with layer three or more includes a wireless physical layer, a wireless data link layer and a processing unit with layer three or more, and the switching unit is replaced by a wireless routing unit.
In addition, the invention can also introduce another base station with a transfer function in the wireless network architecture to support the wired connection between the adjacent base stations. As shown in fig. 14, when a mobile terminal SS enters a BS1 cell from a BS2 cell, the SS can establish an R8 path through a wired transfer station RBS, thereby completing an R8 handover. Multi-hop wired RBSs may also be introduced between adjacent base stations to establish the R8 path. A transit network consisting of multiple wired RBSs, or wireless RBSs, or a mixture of wired RBSs and wireless RBSs and RSS in any topology can also be introduced between adjacent base stations to establish the R8 path.
The base station with the wired relay function may be fixed or mobile, and is itself a base station. The wired RBS may be a layer one relay, a layer two relay, or even a layer three or more relay. The wired RBS is also mainly composed of one switching unit, wireless transceivers and several wired processing units. The wired RBS switching unit is used for data exchange between different base stations (or RBSs) (to support a relay function) and between a base station and a subscriber station (or RSS). For centralized wireless networks, the wired RBS also requires a wired transmission processing unit to be connected to a higher-level device, which may be a base station controller or WiMAX access server (ASN GW), via a wired cable.
The wired RBS structure described in the present invention is shown in fig. 15 and 16, and specifically includes a layer two wired RBS and a layer one wired RBS, which will be described in detail below.
The (one) layer two wired RBS system architecture is shown in fig. 15:
the structure of the RBS depicted in fig. 15 comprises: the wireless base station comprises a group of wired transceivers, a group of wireless transceivers and a switching unit, wherein the group of wired transceivers are communicated with the group of base stations, the intercommunication between the base stations before and after switching is realized under the switching processing of the switching unit; and the RBS also comprises a wired transmission processing unit connected with the upper-level equipment, wherein the upper-level equipment can be CSN (connection service network) equipment and the like.
In the application scenario shown in fig. 14, after receiving data sent by the SS of the BS1 to the CSN from the wired transceiver 1, the data is switched to the wired transmission processing unit through the wired transmission physical layer, the limited data link layer, and the switching unit in sequence, and then sent to the CSN; the handoff related message from BS2 to BS1 is received from the wired transceiver 2, switched to the wired transceiver 1 through the switching unit, and transmitted to BS1 through the wired transmission cable, and vice versa.
Layer (two) -wired RBS system architecture as shown in fig. 16:
the RBS depicted in fig. 16 differs from the RBS shown in fig. 15 in that: the exchange unit is connected between the wired transmission physical layer transmission unit and the wired data link layer transmission unit, and the wireless data link layer transmission unit of the wireless transceiver is directly connected with the wired transmission processing unit.
In the scenario of fig. 14, after receiving data sent by the SS of the BS1 to the CSN from the wired transceiver 1, the data is switched to the wired transmission processing unit through the wired transmission physical layer transmission unit, the switching unit, and the wired data link layer transmission unit in sequence, and then sent to the CSN; the handoff related message from BS2 to BS1 is received from the wired transceiver 2, switched to the wired transceiver 1 through the switching unit, and transmitted to BS1 through the wired transmission cable, and vice versa.
Layer three or more wired RBSs can use layer three for routing and can also filter communication layer three or more for reducing unnecessary transit traffic or safety factors. The structure is similar to the layer two RBS, the difference is that the wired transceiver of the layer three or more wired RBS comprises a wired transmission physical layer, a wired transmission data link layer and a wired transmission layer three or more processing units, and the switching unit is replaced by a wired routing unit.
In the invention, another base station with a transfer function is introduced into a wireless network architecture to support wireless or wired connection between adjacent base stations. As shown in fig. 17, when a mobile terminal SS enters a BS1 cell from a BS2 cell, the SS can establish a wired R8 path with a BS1 and a wireless R8 path with a BS2 through a wired and wireless integrated relay RBS, thereby completing an R8 handover. Multi-hop wired and wireless integrated RBS can be introduced between adjacent base stations to establish R8 path.
As shown in fig. 18, when the mobile terminal SS enters the BS1 cell from the BS2 cell, the SS can establish a wired R8 path with the BS1 through the wired and wireless integrated relay RBS and establish a wireless R8 path with the BS2 through RSS, thereby completing the R8 handover. Multi-hop wired and wireless integrated RBS can be introduced between adjacent base stations to establish R8 path. The R8 path may also be established by introducing a transit network consisting of multiple wired RBSs, or wireless RBSs, or wired-wireless integrated RBSs, or RSS, or a mixture of transit stations in any topology between adjacent base stations.
The base station with the wired and wireless integrated transfer function can be fixed or mobile, and is a base station. The wired and wireless integrated RBS can be a layer two transfer station, even a layer three or more transfer stations. The wired and wireless integrated RBS mainly comprises a switching unit, a plurality of wireless transceivers and a plurality of wired processing units. The wired and wireless integrated RBS switching unit is used for data exchange between different base stations (or RBSs) (to support a relay function) and between a base station and a subscriber station (or RSS). For centralized wireless networks, the wired/wireless integrated RBS also requires a wired transmission processing unit to be connected to a higher-level device, which may be a base station controller or WiMAX access server (ASN GW), via a wired cable.
The wired-wireless integrated RBS uses multiple radio transceivers to support the situation where each BSi (or RBSi) and subscriber station SS (or RSS) of the RBS operate in different frequency bands.
Wired wireless integrated RBSs use a single radio transceiver to support the situation where each BSi (or RBSi) and subscriber station SS (or RSS) of the RBS operate in the same frequency band. BSi (or RBSi) is accessed into a wired wireless integrated RBS in the form of subscriber stations, and each BSi (or RBSi) can be timely communicated with an RBS wireless transceiver through different burst packets (burst) or different frames (frame) to establish reliable communication under the same frequency band; each BSi (or RBSi) can also work simultaneously, and the RBS wireless transceiver is communicated with each BSi (or RBSi) in the same frequency band through different sub-channels (sub-channels), sub-carrier (sub-carrier) groups and directional antennas or intelligent antennas with enough isolation.
In the present invention, the structure of the wired and wireless integrated RBS is shown in fig. 19 and 20:
in the application scenario shown in fig. 17, after the data sent by the SS of BS1 to the CSN is received from the wired transceiver 1, the data is switched by the switching unit to the wired transmission processing unit for processing and sending to the CSN; the handoff related message from BS2 to BS1 is received from the wireless transceiver 2, switched by the switching unit to the wired transceiver 1, and then transmitted to BS1 via the wired cable, and vice versa.
The wired and wireless integrated RBS of layer three or more can use layer three to select the route, and can also filter the communication of layer three or more for reducing unnecessary transit flow or safety factor. The structure is similar to the layer two RBS, the difference is that the wired transceiver of the layer three or more wired and wireless integrated RBS comprises a wired or wireless physical layer, a wired or wireless data link layer and a wired or wireless transmission layer three or more processing units, and the switching unit is replaced by the routing unit.
In summary, in the present invention, the handover rate in the wireless access system can be increased through the relay device, and the reliability of handover can be improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (13)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510082808XA CN100502552C (en) | 2005-07-08 | 2005-07-08 | Transit equipment and system for realizing fast switching |
| PCT/CN2006/001526 WO2007003130A1 (en) | 2005-07-05 | 2006-06-30 | A transfer device and system for realizing speed handoff and wireless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510082808XA CN100502552C (en) | 2005-07-08 | 2005-07-08 | Transit equipment and system for realizing fast switching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1863379A true CN1863379A (en) | 2006-11-15 |
| CN100502552C CN100502552C (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510082808XA Expired - Fee Related CN100502552C (en) | 2005-07-05 | 2005-07-08 | Transit equipment and system for realizing fast switching |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009055973A1 (en) * | 2007-11-02 | 2009-05-07 | Alcatel Shanghai Bell Co., Ltd. | System and method for transmitting interactive data between neighbor bss via ms |
| CN102104937A (en) * | 2009-12-17 | 2011-06-22 | 中兴通讯股份有限公司 | Method and system for reducing power consumption under multi-frequency range group net |
| CN102273171A (en) * | 2009-03-19 | 2011-12-07 | 上海贝尔股份有限公司 | A method, device and computer program for interactively sharing information between communication units |
| CN104301958A (en) * | 2007-11-02 | 2015-01-21 | 上海贝尔股份有限公司 | Method for transmitting interference management information between adjacent BSs through MS and BSs |
| CN108847877A (en) * | 2018-08-02 | 2018-11-20 | 西安安源智造机电设备有限公司 | Wireless communication is the same as frequency repeater system |
-
2005
- 2005-07-08 CN CNB200510082808XA patent/CN100502552C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009055973A1 (en) * | 2007-11-02 | 2009-05-07 | Alcatel Shanghai Bell Co., Ltd. | System and method for transmitting interactive data between neighbor bss via ms |
| CN104301958A (en) * | 2007-11-02 | 2015-01-21 | 上海贝尔股份有限公司 | Method for transmitting interference management information between adjacent BSs through MS and BSs |
| CN102273171A (en) * | 2009-03-19 | 2011-12-07 | 上海贝尔股份有限公司 | A method, device and computer program for interactively sharing information between communication units |
| CN102104937A (en) * | 2009-12-17 | 2011-06-22 | 中兴通讯股份有限公司 | Method and system for reducing power consumption under multi-frequency range group net |
| CN108847877A (en) * | 2018-08-02 | 2018-11-20 | 西安安源智造机电设备有限公司 | Wireless communication is the same as frequency repeater system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100502552C (en) | 2009-06-17 |
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