WO2008037814A1 - Procédé d'allocation d'identité de connexion - Google Patents

Procédé d'allocation d'identité de connexion Download PDF

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Publication number
WO2008037814A1
WO2008037814A1 PCT/EP2007/060408 EP2007060408W WO2008037814A1 WO 2008037814 A1 WO2008037814 A1 WO 2008037814A1 EP 2007060408 W EP2007060408 W EP 2007060408W WO 2008037814 A1 WO2008037814 A1 WO 2008037814A1
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WO
WIPO (PCT)
Prior art keywords
cell
relay station
connection identity
aforementioned
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2007/060408
Other languages
English (en)
Inventor
Hui Li
Ping Li
Yi Sheng Xue
Wolfgang Zirwas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Nokia Siemens Networks GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Siemens Networks GmbH and Co KG filed Critical Nokia Siemens Networks GmbH and Co KG
Publication of WO2008037814A1 publication Critical patent/WO2008037814A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • This invention involves the wireless communication field, and specifically a type of connection identity allocation method.
  • Wimax World Interoperability for Microwave Access
  • IEEE Institute of Electrical and Electronics Engineers
  • Wimax is a Wireless Metropolitan Area Network (WMAN) technology, a type of new spatial connection standard proposed for the microwave and millimeter wave band.
  • Wimax provides advantages such as a high frequency spectrum usage rate, wide coverage areas, and a high data transmission rate. More importantly, Wimax combines the superior bandwidth of traditional cable-based broadband connections with the flexibility and mobility of wireless connections, and can also provide all types of service to satisfy high Quality of Service (QOS) requirements.
  • QOS Quality of Service
  • the terminals access the cells of Wimax' s Base Station via wireless means, and can achieve free mobility by moving through different cells.
  • the difference with previous technologies is that in Wimax, the connections between cells and terminals depend on the creation of different connection identities (CIDs) . Cells must therefore allocate connection identities as part of the process whereby a terminal connects and disconnects from a network.
  • CIDs connection identities
  • connection identity allocations under existing technology is as follows: The terminal completes the initial arrangements, and sends a connection request to the network; upon receiving this, the network sends either a Basic CID or a Primary CID to the terminal, allowing the terminal to complete the connection and gain control. When the terminal registers on the network, the network must also assign a Secondary CID. These identity allocation processes accomplish such negotiation tasks as access control prior to data transmission and resource allocation. Depending on the results of the prior negotiation between the network and the terminal, a Transport CID is allocated to the terminal to control the connection for data transmission between the terminal and the network, which allows data transmission between the terminal and the cells. This allocation process is performed through the interchange of a series of signals between the terminal and the network.
  • Standard 802.16j also proposes the arrangement of Relay Stations (RS) around the cells so that the terminal communicates with the cell through the relay station, thus allowing improved cell coverage and enhanced capacity.
  • RS Relay Stations
  • This allocation process includes an interchange of a series of signals between the terminal and the network, an interchange of signals which is much larger than that used for the cell relay station transfer ownership transaction, and the process of which also takes a relatively long time.
  • Data transmission is interrupted during this signal interchange process, and this can therefore cause extended time delays at the terminal; terminals receiving data can suffer problems with interruptions leading to drops in quality, and the communication link established between the terminal and the target cell can also potentially fail if any of the signals in the process are lost, causing the terminal line to cut out; this complex signal interchange process increases the rate of terminal line drops.
  • the aim of this invention is to provide a connection identity allocation method which helps to overcome the problems of the existing technology arising in the cell relay station ownership transfer process, as this requires the reallocation of connection identities and thus requires complex signal interchanges during the negotiation process, causing increases in excessive, extended time delays in data transactions between the cell and the terminal, drops in quality and an increase of line drop rates.
  • this invention provides a type of connection identity allocation method implemented as follows:
  • connection identity allocation method whereby the network allocates cells connected by an ownership relationship to the same relay station to association-cell-sets, and allocates a connection identity group to the aforementioned relay station, so that terminals may communicate with a cell within the cell network using connection identities in the connection identity group, comprising the following steps: - A -
  • the network informs the target cell which has an ownership relationship to the aforementioned relay station to reserve the aforementioned connection identity group, where the aforementioned target cell belongs to the aforementioned association-cell-set; the transfer of relay station ownership occurs, and the original cell releases the connection identity with the terminal;
  • the terminal uses the reserved connection identity in the connection identity group to communicate with the aforementioned target cell.
  • Step A is performed through the following steps :
  • the transfer of relay station ownership occurs, and the original cell releases the connection identity with the terminal; the network only instructs the aforementioned target cell to reserve the aforementioned connection identity group.
  • Step A the transfer of relay station ownership occurs, and the original cell releases the connection identity with the terminal; the network only instructs the aforementioned target cell to reserve the aforementioned connection identity group.
  • the aforementioned allocation of cells connected by an ownership relationship to the same relay station to an association-cell-set further includes:
  • the aforementioned association-cell-set includes or excludes connected cells.
  • the network allocates a connection identity group to the relay station through the following step:
  • connection identity group is allocated to the relay station in accordance with that relay station's load.
  • the aforementioned process wherein the network allocates a connection identity group to the relay station further includes :
  • the aforementioned association-cell-set includes or excludes connected cells.
  • the aforementioned process wherein the network allocates a connection identity group to the relay station further includes :
  • Connection identities in the aforementioned connection identity group can be altered.
  • connection identities in/from the aforementioned connection identity group:
  • Connection identities are included or excluded from the connection identity group in accordance with the load on the relay station.
  • this invention allows the network to allocate cells connected by an ownership relationship to the same relay station to association-cell-sets, allocate a connection identity group to the aforementioned relay station and instructs target cells within the cell set which have an ownership relationship with the relay station to reserve the connection identity group when the transfer of the ownership relationship occurs, so that terminals use the same connection identity within the connection identity group to communicate with the target cell, thus avoiding the signal interchange created during the connection identity reallocation negotiation procedure, simplifying the signaling procedure for terminal transmission during the relay station ownership transfer, and thus reducing time delays, improving service quality, and reducing line drop rates.
  • Diagram 1 Flow chart for the connection identity allocation method of this invention
  • Diagram 2 Schematic diagram for the allocation of cells of this invention
  • the aim of this invention is to provide a type of connection identity allocation method.
  • it When implemented in practice, it establishes an association-cell-set with cells which are connected by ownership of the same relay station, and this cell network is allocated a public connection identity group.
  • the network instructs all target cells to reserve the connection identities in the public connection identity group, such that a terminal will be able to use the same connection identity in the aforementioned connection identity group before and after any transfer of relay station ownership.
  • Standard 802.16j proposes relay station (RS) technology.
  • the terminal communicates with the cell through a relay station, a method which can enhance cell coverage, increase capacity, reduce the terminal's required emission power, and reduce the influence of shadows. Moreover, this method can achieve the goal of balancing the load within one cell by altering the ownership relationship between the relay station and the cell.
  • the method in this invention of altering the ownership relationship between the relay station and the cell may be automatically adjusted by the relay station based on the load on surrounding cells.
  • Step 101 All cells connected by ownership of the same relay station are grouped into an association-cell-set.
  • existing technology also allows a method for a relay station to be transferred from the ownership of one cell to the ownership of another.
  • the ownership relationship between the cell and the relay station changes.
  • a cell which has an ownership relationship with a relay station is defined as an association cell, such that all cells associated with that relay station can be grouped into an association-cell-set.
  • the network is responsible for establishing, maintaining and preserving the association-cell-set.
  • the RS association-cell-set comprises BSl, and BS2, such that ⁇ BS1, BS2 ⁇ are the RS association-cell-set.
  • BSl and BS2 are simultaneously highly loaded because of changes in network load, RS initiates a request to function under the ownership of BS3 to the relay station, and then BS3 joins the relay station's corresponding association-cell-set, such that the association-cell-set becomes ⁇ BS1, BS2, BS3 ⁇ .
  • this cell may be removed from the association-cell-set.
  • Step 102 A common set of CIDs is allocated to the association- cell-set .
  • the network will assign an association-cell-set a set quantity of connection identities, and these connection identities are collectively the common set of CIDs. For example, if the five connection identities 0001, 0002, 0003, 0004 and 0005 are assigned to RS corresponding terminals, the five connection identities 0001 to 0005 comprise the common connection identity group. Each terminal connected to an associated cell through this RS will use a connection identity from this common set of CIDs.
  • the network is responsible for establishing, maintaining and preserving the common set of CIDs.
  • the network When the network allocates the common set of CIDs, it can do so based on the normal static status of the relay station load within the association-cell-set, and can also reallocate IDs on the basis of the dynamic status of the load. Dynamic reallocation in practice works as follows - when the relay station load increases, the network will allocate further common IDs to the relay station; when the relay station load drops, the network will correspondingly reduce the common IDs allocated to the relay station.
  • connection identities can also change without changing the size of the common set of CIDs.
  • the current association-cell-set is ⁇ BS1, BS2 ⁇ , with RS belonging to BSl, and RS' s corresponding common set of CIDs is ⁇ 0001, 0002, 0003, 0004 and 0005 ⁇ .
  • RS transmits a new ownership request to BS3, at which point BS3 is added to the association- cell-set, and the association-cell-set then comprises ⁇ BS1, BS2, BS3 ⁇ .
  • connection identity 0001 in the common set of CIDs must be replaced, for example with 0011, such that once the RS belongs to BS3, the corresponding common set of CIDs now comprises ⁇ 0011, 0002, 0003, 0004 and 0005 ⁇ . In this way, the quantity of the common set of CIDs remains unchanged, while one of its connection identities is changed. This kind of connection identity change is allocated and maintained by the network.
  • Step 103 Terminals use the same connection identities in the common set of CIDs before and after the transfer of ownership between different cells in the association-cell-set.
  • the connection between the terminal and the cell is created through the connection identity, namely, when the terminal is communicating with the cell, it transmits and receives data using the connection identity.
  • the terminal initially uses a connection identity in the common set of CIDs to communicate with the original cell through the relay station.
  • the original cell can transfer ownership of the relay station to a cell with a lighter load belonging to the same association-cell-set, so that the terminal can establish communications with the target cell which owns the relay station.
  • the target cell which owns the relay station.
  • Step 301 The network transmits a command to the target cell instructing the target cell to reserve a connection identity from the common set of CIDs for that relay station, and the target cell performs this command.
  • Step 302 The terminal terminates the connection with the original cell, i.e. releases the connection identity used to communicate with the original cell.
  • Steps 301 and 302 have no strict successive order, i.e. Step
  • Step 301 the key point being that the target cell must have confirmed the ownership transfer .
  • Step 303 The terminal uses the same reserved connection identity in the connection identity group to communicate with the aforementioned target cell.
  • connection identity is thus the same as the connection identity used by the terminal to communicate with the original cell prior to the transfer of ownership.
  • the terminal does not change its connection identity, such that when the relay station undergoes a transfer of ownership within the association-cell-set, the terminal uses the same connection identity in the common set of CIDs before and after the transfer .
  • connection identities for all terminals under the aforementioned relay station are all handled using the same method given in Steps 301-303 during the relay station ownership transfer process.
  • Step 401 The network transmits a command to associated cells instructing each cell in the association-cell-set to reserve a connection identity in the common set of CIDs, and each cell in the association-cell-set will perform this command.
  • This step differs from Step 301 in Method 1 in that in Method
  • the association-cell-set comprises ⁇ BS1, BS2 and BS3 ⁇ , and the terminal initially connects to BSl through RS.
  • Method 1 When the ownership of that relay station is transferred to BS2, Method 1 only instructs target cell BS2 to reserve a connection identity in the common set of CIDs, while Method 2 instructs BSl, BS2 and BS3 in a confirmed association-cell-set all to reserve a connection identity in the common set of CIDs, regardless of which cell the terminal is connected to. Method 1 is more nimble, while the process in Method 2 is simpler.
  • Step 402 The terminal terminates the connection with the original cell, i.e. releases the connection identity used to communicate with the original cell.
  • Step 403 The terminal uses the same reserved connection identity in the connection identity group to communicate with the target cell.
  • Chart 5 shows an optimal implementation of this invention.
  • Relay station RS initially belongs to BSl and may also belong to BS2.
  • the network establishes an association-cell-set ⁇ BS1, BS2 ⁇ corresponding to RS .
  • 4 users connect to service cell BSl through RS, and the network allocates a common set of CIDs ⁇ 0001, 0002, 0003 and 0004 ⁇ , each terminal using one connection identity.
  • the RS ownership relationship is adjusted, such that this is transferred from BSl to BS2.
  • the network instructs BS2 to reserve the connection identities in the common set of CIDs, the terminals release the connection identities with the original cell, terminate their connections with the original cell, and the terminals then use the reserved same connection identities in the connection identity group to communicate through the relay station with the target cell.
  • MSl with connection identity 0001 MSl initially communicates through RS with BSl; after RS is transferred to BS2, MSl continues to use connection identity 0001 to communicate through RS with BS2.
  • the connection identities of other terminals are processed using the same method as the connection identity of MSl.
  • the network may also instruct each cell in the association-cell-set to reserve a connection identity in the common set of CIDs, including the target cell for the RS ownership transfer, such that when RS is transferred from BSl back to BS2, the terminal uses the same reserved connection identity in the connection identity group to communicate with the target cell through the aforementioned RS.
  • the network allocates cells BSl and BS2, which have an ownership relationship to relay station RS, to an association-cell-set, and also allocates a common set of CIDs to the relay station, such that when the relay station undergoes a transfer of ownership, the network informs the target cell to reserve this common set of CIDs, so that the terminal uses the same connection identity before and after the relay station' s transfer of ownership, and thus avoiding the process of reallocating Basic CIDs, Primary CIDs, Secondary CIDs and Transport CIDs etc. to terminals, reducing network (especially relay station) signal interchanges with terminals and simplifying signals in the relay station ownership transfer process, thus reducing time delays, improving service quality, and reducing line drop rates.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Cette invention concerne un type de procédé d'allocation d'identité de connexion, pour une utilisation dans Wimax, ce par quoi le réseau alloue des cellules connectées par une relation de propriétaire à la même station de relais à des ensembles de cellules d'association, et alloue un groupe d'identités de connexion à la station de relais mentionnée ci-dessus, de telle sorte que des terminaux peuvent communiquer avec une cellule dans l'ensemble de cellules d'association à l'aide d'identités de connexion dans le groupe d'identités de connexion, par les étapes suivantes : le réseau informe la cellule cible, qui a une relation de propriétaire avec la station de relais, de réserver le groupe d'identités de connexion mentionné ci-dessus, la cellule cible mentionnée ci-dessus appartenant à l'ensemble de cellules mentionné ci-dessus ; le transfert de propriété de la station de relais se produit, et la cellule originale libère l'identité de connexion avec le terminal ; le terminal utilise alors l'identité de connexion réservée dans le groupe d'identités de connexion pour communiquer avec la cellule cible mentionnée ci-dessus. L'utilisation de cette invention peut éviter des échanges de signaux pendant la procédure de négociation de réallocation d'identité de connexion, simplifie la procédure de signal de transfert de propriété de la station de relais, réduisent ainsi les retards temporels, améliorant la qualité de service et réduisant les taux de perte en ligne.
PCT/EP2007/060408 2006-09-30 2007-10-01 Procédé d'allocation d'identité de connexion Ceased WO2008037814A1 (fr)

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CN200610141587.3 2006-09-30
CNA2006101415873A CN101155384A (zh) 2006-09-30 2006-09-30 连接标识的配置方法

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Cited By (2)

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WO2010085918A1 (fr) * 2009-02-02 2010-08-05 华为技术有限公司 Procédé, équipement et système d'auto-configuration de cellule de desserte de noeud de relais
CN101854633A (zh) * 2010-06-08 2010-10-06 上海交通大学 均衡式自组织网络小区pci的自配置方法

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WO2010105432A1 (fr) * 2009-03-20 2010-09-23 华为技术有限公司 Procédé de communication, équipement de relais, équipement de terminal et système de relais

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010085918A1 (fr) * 2009-02-02 2010-08-05 华为技术有限公司 Procédé, équipement et système d'auto-configuration de cellule de desserte de noeud de relais
CN101854633A (zh) * 2010-06-08 2010-10-06 上海交通大学 均衡式自组织网络小区pci的自配置方法

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