JPH10308775A - Packet communication method - Google Patents
Packet communication methodInfo
- Publication number
- JPH10308775A JPH10308775A JP11556597A JP11556597A JPH10308775A JP H10308775 A JPH10308775 A JP H10308775A JP 11556597 A JP11556597 A JP 11556597A JP 11556597 A JP11556597 A JP 11556597A JP H10308775 A JPH10308775 A JP H10308775A
- Authority
- JP
- Japan
- Prior art keywords
- packet
- terminal
- communication
- receiving
- radio base
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無線回線を介して
パケットデータ（例えば音声情報）の送受信を行うパケ
ット通信方法に関する。[0001] 1. Field of the Invention [0002] The present invention relates to a packet communication method for transmitting and receiving packet data (for example, voice information) via a wireless line.
【０００２】[0002]
【従来の技術】近年商用化されたパーソナルハンディホ
ンシステム（ＰＨＳ）では、端末（ＰＳ）が無線セル間
を移動するとハンドオーバ手順を起動し、再発呼して通
信を継続する。しかし、この再発呼のための通信中断時
間が従来の移動通信よりも長いので、高速移動するユー
ザの場合には、通信中断時間が通信全体に占める割合が
許容限度を越えてしまい、通信サービスの提供ができな
くなる。このように、ＰＨＳにはユーザの移動速度に厳
しい制約があり、これがＰＨＳの普及にとって大きな障
害になっている。2. Description of the Related Art In a personal handy phone system (PHS) which has been commercialized in recent years, when a terminal (PS) moves between radio cells, a handover procedure is started, a call is re-established, and communication is continued. However, since the communication interruption time for the re-call is longer than that of the conventional mobile communication, in the case of a user moving at a high speed, the ratio of the communication interruption time to the entire communication exceeds the permissible limit, and the communication service is not provided. Cannot be provided. As described above, PHS has severe restrictions on the moving speed of the user, and this is a major obstacle to the spread of PHS.
【０００３】一方、ＰＨＳは、従来のディジタル移動通
信（ＰＤＣ ( Personal DigitalCellular) ) 方式に比
べて大きな伝送能力をもっており、これを用いて種々の
データ通信サービスの提供が考えられている。その中の
一つに、ＰＨＳの回線でパケット通信を行うものがあ
る。これは、発生したパケットの量やトラヒック状況等
に応じて、ＰＨＳで使用可能な４スロットまで複数のス
ロットを使用した通信を可能にするものである。On the other hand, the PHS has a larger transmission capacity than a conventional digital mobile communication (PDC (Personal Digital Cellular)) system, and it is considered that various data communication services are provided using the PHS. One of them is one that performs packet communication on a PHS line. This enables communication using a plurality of slots up to four slots usable in the PHS according to the amount of generated packets, traffic conditions, and the like.
【０００４】[0004]
【発明が解決しようとする課題】ところで、インターネ
ット電話のようにパケットにより音声を伝送することは
可能であるが、ＰＨＳで行う場合には無線セル間を移動
する際の通信中断時間が音声の途切れにならないような
対策が必要になる。本発明は、無線セル間を移動する際
の通信中断の影響を吸収し、音声通信のように実時間性
が要求される通信サービスを可能にするパケット通信方
法を提供することを目的とする。By the way, it is possible to transmit voice by packet like an Internet telephone, but when performing by PHS, the communication interruption time when moving between radio cells is interrupted. It is necessary to take countermeasures that will not be a problem. SUMMARY OF THE INVENTION It is an object of the present invention to provide a packet communication method that absorbs the influence of communication interruption when moving between wireless cells and enables a communication service that requires real-time performance such as voice communication.
【０００５】[0005]
【課題を解決するための手段】請求項１に記載のパケッ
ト通信方法は、受信側端末でパケット受信後の処理を遅
延時間τの経過後に行う。また、ハンドオーバ時に、送
信側端末は送信パケットを蓄積し、通信再開後に蓄積さ
れたパケットを送信する。受信側端末ではそのパケット
に限って即時に処理する。これにより、無線セル間の移
動に伴う通信中断の影響を吸収することができる。According to a first aspect of the present invention, there is provided a packet communication method in which a receiving terminal performs processing after receiving a packet after a lapse of a delay time τ. Also, at the time of handover, the transmitting terminal accumulates transmission packets, and transmits the accumulated packets after resuming communication. The receiving terminal immediately processes only the packet. As a result, it is possible to absorb the effect of communication interruption due to movement between wireless cells.
【０００６】請求項２に記載のパケット通信方法は、受
信側端末でパケット受信後の処理を遅延時間τの経過後
に行う。また、ハンドオーバ時に、パケット制御局は通
信再開までの間に到着したパケットを蓄積し、通信再開
後に蓄積されたパケットを送信する。受信側端末はその
パケットに限って即時に処理する。これにより、無線セ
ル間の移動に伴う通信中断の影響を吸収することができ
る。In the packet communication method according to the second aspect, the receiving terminal performs a process after receiving the packet after a delay time τ has elapsed. Also, at the time of handover, the packet control station accumulates packets arriving before communication restarts, and transmits the accumulated packets after communication restarts. The receiving terminal immediately processes only the packet. As a result, it is possible to absorb the effect of communication interruption due to movement between wireless cells.
【０００７】請求項３に記載のパケット通信方法は、無
線基地局で到着したパケットを遅延時間τの経過後に受
信側の端末に送信する。また、ハンドオーバ時に、移動
先の無線基地局は通信再開後に到着したパケットに限っ
て即時に受信側の端末に送信する。これにより、無線セ
ル間の移動に伴う通信中断の影響を吸収することができ
る。According to a third aspect of the present invention, a packet communication method transmits a packet arriving at a radio base station to a receiving terminal after a lapse of a delay time τ. Also, at the time of handover, the destination wireless base station immediately transmits only the packet that has arrived after resuming communication to the terminal on the receiving side. As a result, it is possible to absorb the effect of communication interruption due to movement between wireless cells.
【０００８】請求項４に記載のパケット通信方法は、端
末間で行われるパケット通信において請求項３の方法を
適用する。[0008] The packet communication method according to claim 4 applies the method according to claim 3 to packet communication performed between terminals.
【０００９】[0009]
【発明の実施の形態】図１は、本発明のパケット通信方
法を適用する移動通信システムの構成例を示す。図にお
いて、無線基地局（ＣＳ）１ａ，１ｂは、それぞれ所定
の範囲の無線セル２ａ，２ｂを形成する。各無線セル２
ａ，２ｂに在圏する移動端末（ＰＳ）３は、それぞれ無
線基地局１ａ，１ｂを介してパケット制御局４に接続さ
れる。パケット制御局４には、さらにパケット網５を介
して固定端末６が接続される。移動端末３は、無線基地
局１、パケット制御局４、パケット網５を介して、他の
無線セルに在圏する移動端末３または固定端末６とパケ
ット通信を行う。また、移動端末３が無線セル２ａから
無線セル２ｂに移動するときにはハンドオーバ手順を起
動し、パケット制御局４にパケットのルーティング経路
を無線セル２ａから無線セル２ｂに変更するように要求
する。FIG. 1 shows a configuration example of a mobile communication system to which a packet communication method of the present invention is applied. In the figure, radio base stations (CS) 1a and 1b form radio cells 2a and 2b in a predetermined range, respectively. Each wireless cell 2
Mobile terminals (PS) 3 located in a and 2b are connected to a packet control station 4 via wireless base stations 1a and 1b, respectively. A fixed terminal 6 is further connected to the packet control station 4 via a packet network 5. The mobile terminal 3 performs packet communication with the mobile terminal 3 or the fixed terminal 6 located in another wireless cell via the wireless base station 1, the packet control station 4, and the packet network 5. When the mobile terminal 3 moves from the wireless cell 2a to the wireless cell 2b, the mobile terminal 3 activates a handover procedure and requests the packet control station 4 to change the packet routing path from the wireless cell 2a to the wireless cell 2b.
【００１０】（平常時のパケット処理方法）図２は、本
発明のパケット通信方法における平常時の動作例を示
す。図において、端末Ａ，Ｂの少なくとも一方は移動端
末（ＰＳ）である。ここで、平常時とは、移動端末が１
つの無線セルに在圏したままの状態をいう。この平常時
には、受信側の端末Ｂはパケット受信後の処理をあらか
じめ設定された遅延時間τの経過後に行う。(Normal Packet Processing Method) FIG. 2 shows an example of normal packet operation in the packet communication method of the present invention. In the figure, at least one of terminals A and B is a mobile terminal (PS). Here, the normal state means that the mobile terminal is 1
It refers to a state where the mobile station remains in one wireless cell. In this normal state, the terminal B on the receiving side performs a process after receiving the packet after a predetermined delay time τ has elapsed.
【００１１】（ハンドオーバ時のパケット処理方法）
図３は、本発明のパケット通信方法におけるハンドオー
バ時の第１の動作例を示す。図において、受信側の端末
Ｂがパケット受信後の処理を遅延時間τの経過後に行っ
ているときに、ハンドオーバ手順が起動され、通信中断
時間ｔが生じたとする。このとき、送信側の端末Ａで
は、通信中断時間ｔの間に発生する送信パケットを蓄積
し、通信再開後に蓄積されたパケットを送信する。受信
側の端末Ｂでは、そのパケットに限って即時に処理す
る。以後到着するパケットは、再び遅延時間τの経過後
に処理する。これにより、無線セル間の移動に伴う通信
中断の影響を吸収することができる。(Packet Processing Method at Handover)
FIG. 3 shows a first operation example at the time of handover in the packet communication method of the present invention. In the figure, it is assumed that the handover procedure is activated and the communication interruption time t occurs when the terminal B on the receiving side is performing the process after receiving the packet after the elapse of the delay time τ. At this time, the terminal A on the transmission side accumulates the transmission packets generated during the communication interruption time t, and transmits the accumulated packets after the communication is resumed. Terminal B on the receiving side immediately processes only the packet. Packets arriving thereafter are processed again after the elapse of the delay time τ. As a result, it is possible to absorb the effect of communication interruption due to movement between wireless cells.
【００１２】（ハンドオーバ時のパケット処理方法）
図４は、本発明のパケット通信方法におけるハンドオー
バ時の第２の動作例を示す。図において、端末Ａ，Ｂの
少なくとも一方は移動端末（ＰＳ）であり、その間にパ
ケット制御局が介在する。受信側の端末Ｂがパケット受
信後の処理を遅延時間τの経過後に行っているときに、
ハンドオーバ手順が起動され、通信中断時間ｔが生じた
とする。このとき、パケット制御局は、受信側の端末Ｂ
から送信されたハンドオーバ要求信号中に含まれる送達
確認情報により、端末Ｂへの送達が確認された最後のパ
ケットの次からハンドオーバ完了まで到着するパケット
を蓄積する。そして、通信再開後にパケット制御局から
蓄積されたパケットを送信する。受信側の端末Ｂでは、
そのパケットに限って即時に処理する。以後到着するパ
ケットは、再び遅延時間τの経過後に処理する。これに
より、無線セル間の移動に伴う通信中断の影響を吸収す
ることができる。(Packet processing method at handover)
FIG. 4 shows a second operation example at the time of handover in the packet communication method of the present invention. In the figure, at least one of terminals A and B is a mobile terminal (PS), between which a packet control station is interposed. When the terminal B on the receiving side performs the processing after receiving the packet after the elapse of the delay time τ,
It is assumed that a handover procedure is activated and a communication interruption time t occurs. At this time, the packet control station operates the terminal B on the receiving side.
According to the acknowledgment information included in the handover request signal transmitted from the terminal, the packet arriving after the last packet whose delivery to the terminal B is confirmed until the handover is completed is accumulated. Then, after the communication is resumed, the stored packet is transmitted from the packet control station. At the receiving terminal B,
Immediately process only the packet. Packets arriving thereafter are processed again after the elapse of the delay time τ. As a result, it is possible to absorb the effect of communication interruption due to movement between wireless cells.
【００１３】（ハンドオーバ時のパケット処理方法）
図５は、本発明のパケット通信方法におけるハンドオー
バ時の第３の動作例を示す。図において、端末Ａ，Ｂの
少なくとも一方は移動端末（ＰＳ）であり、その間にハ
ンドオーバにより移動する無線基地局１，２が介在す
る。ここでは、無線基地局１，２が端末Ａからの受信パ
ケットを遅延時間τの経過後に端末Ｂに送信するものと
し、受信側の端末Ｂは受信パケットを即時に処理するも
のとする。(Packet Processing Method at Handover)
FIG. 5 shows a third operation example at the time of handover in the packet communication method of the present invention. In the figure, at least one of terminals A and B is a mobile terminal (PS), and radio base stations 1 and 2 that move by handover intervene between them. Here, it is assumed that the wireless base stations 1 and 2 transmit the received packet from the terminal A to the terminal B after the elapse of the delay time τ, and the receiving-side terminal B processes the received packet immediately.
【００１４】端末Ａから送信されたパケットが無線基地
局１に受信され、遅延時間τの経過後に端末Ｂに送信さ
れているときに、ハンドオーバが起動されたとする。こ
のとき、送信側の端末Ａでは、通信中断時間ｔの間に発
生する送信パケットを蓄積し、通信再開後に無線基地局
２に蓄積されたパケットを送信する。無線基地局２は、
そのパケットに限って即時に端末Ｂに送信する。以後、
無線基地局２に到着するパケットは、再び遅延時間τの
経過後に端末Ｂに送信する。これにより、無線セル間の
移動に伴う通信中断の影響を吸収することができる。It is assumed that a handover is activated when a packet transmitted from terminal A is received by radio base station 1 and transmitted to terminal B after elapse of delay time τ. At this time, the terminal A on the transmission side stores the transmission packet generated during the communication interruption time t, and transmits the packet stored in the radio base station 2 after the communication is resumed. The radio base station 2
Only the packet is immediately transmitted to the terminal B. Since then
The packet arriving at the wireless base station 2 is transmitted to the terminal B again after the elapse of the delay time τ. As a result, it is possible to absorb the effect of communication interruption due to movement between wireless cells.
【００１５】（中継端末変更時のパケット処理方法）図
６は、本発明のパケット通信方法における中継端末変更
時の動作例を示す。本実施形態は、図５に示す無線基地
局１，２に代えて、端末Ｃ，Ｄが端末Ａから端末Ｂへの
パケットを中継する構成を特徴とする。すなわち、端末
Ａから送信されたパケットが端末Ｃに受信され、遅延時
間τの経過後に端末Ｂに送信されているときに、中継す
る端末Ｃを端末Ｄに変更する処理が起動されたとする。
このとき、送信側の端末Ａでは、通信中断時間ｔの間に
発生する送信パケットを蓄積し、通信再開後に端末Ｄに
蓄積されたパケットを送信する。端末Ｄは、そのパケッ
トに限って即時に端末Ｂに送信する。以後、端末Ｄに到
着するパケットは、再び遅延時間τの経過後に端末Ｂに
送信する。これにより、中継端末を変更する際に生ずる
通信中断の影響を吸収することができる。(Packet Processing Method When Changing Relay Terminal) FIG. 6 shows an operation example when changing the relay terminal in the packet communication method of the present invention. This embodiment is characterized in that terminals C and D relay packets from terminal A to terminal B instead of the radio base stations 1 and 2 shown in FIG. That is, it is assumed that when a packet transmitted from the terminal A is received by the terminal C and is transmitted to the terminal B after the elapse of the delay time τ, a process of changing the terminal C to be relayed to the terminal D is started.
At this time, the terminal A on the transmission side stores the transmission packet generated during the communication suspension time t, and transmits the packet stored in the terminal D after the communication is resumed. The terminal D immediately transmits the packet to the terminal B only. Thereafter, the packet arriving at the terminal D is transmitted to the terminal B again after the elapse of the delay time τ. As a result, it is possible to absorb the effect of communication interruption that occurs when changing the relay terminal.
【００１６】[0016]
【発明の効果】以上説明したように、本発明のパケット
通信は、ＰＨＳにおけるハンドオーバ時の通信中断の影
響を吸収することができるので、実時間性を要求される
通信サービス、特に音声通信サービスを提供することが
できる。As described above, the packet communication of the present invention can absorb the influence of the communication interruption at the time of handover in the PHS. Can be provided.
【図１】本発明のパケット通信方法を適用する移動通信
システムの構成例を示すブロック図。FIG. 1 is a block diagram showing a configuration example of a mobile communication system to which a packet communication method according to the present invention is applied.
【図２】本発明のパケット通信方法における平常時の動
作例を示す図。FIG. 2 is a diagram showing an example of a normal operation in the packet communication method of the present invention.
【図３】本発明のパケット通信方法におけるハンドオー
バ時の第１の動作例を示す図。FIG. 3 is a diagram showing a first operation example at the time of handover in the packet communication method of the present invention.
【図４】本発明のパケット通信方法におけるハンドオー
バ時の第２の動作例を示す図。FIG. 4 is a diagram showing a second operation example at the time of handover in the packet communication method of the present invention.
【図５】本発明のパケット通信方法におけるハンドオー
バ時の第３の動作例を示す図。FIG. 5 is a diagram showing a third operation example at the time of handover in the packet communication method of the present invention.
【図６】本発明のパケット通信方法における中継端末変
更時の動作例を示す図。FIG. 6 is a diagram showing an operation example when a relay terminal is changed in the packet communication method of the present invention.
１ 無線基地局（ＣＳ） ２ 無線セル ３ 移動端末（ＰＳ） ４ パケット制御局 ５ パケット網 ６ 固定端末 Reference Signs List 1 radio base station (CS) 2 radio cell 3 mobile terminal (PS) 4 packet control station 5 packet network 6 fixed terminal
Claims (4)
続され、各無線基地局を中心にそれぞれ形成される無線
セル内に位置する移動端末が、無線基地局およびパケッ
ト制御局を介して移動端末または固定端末とパケット通
信を行うパケット通信方法において、 受信側の端末は、パケット受信後の処理を遅延時間τの
経過後に行い、 前記移動端末の無線セル間の移動によるハンドオーバ時
に、送信側の端末は送信パケットを蓄積し、通信再開後
に蓄積されたパケットを送信し、受信側の端末はそのパ
ケットに限って即時に処理することを特徴とするパケッ
ト通信方法。A plurality of radio base stations are connected to a packet control station, and a mobile terminal located in a radio cell formed around each radio base station moves via the radio base station and the packet control station. In a packet communication method for performing packet communication with a terminal or a fixed terminal, the receiving terminal performs processing after receiving the packet after a delay time τ has elapsed, and at the time of handover due to movement of the mobile terminal between radio cells, the transmitting side A packet communication method in which a terminal stores a transmission packet, transmits the stored packet after resuming communication, and a receiving-side terminal immediately processes only the packet.
続され、各無線基地局を中心にそれぞれ形成される無線
セル内に位置する移動端末が、無線基地局およびパケッ
ト制御局を介して移動端末または固定端末とパケット通
信を行うパケット通信方法において、 受信側の端末は、パケット受信後の処理を遅延時間τの
経過後に行い、 前記移動端末の無線セル間の移動によるハンドオーバ時
に、パケット制御局は通信再開までの間に到着したパケ
ットを蓄積し、通信再開後に蓄積されたパケットを送信
し、受信側の端末はそのパケットに限って即時に処理す
ることを特徴とするパケット通信方法。2. A plurality of radio base stations are connected to a packet control station, and a mobile terminal located in a radio cell formed around each radio base station moves via the radio base station and the packet control station. In a packet communication method for performing packet communication with a terminal or a fixed terminal, the receiving terminal performs a process after receiving the packet after a lapse of a delay time τ, and performs a handover due to movement of the mobile terminal between radio cells, a packet control station. Is a packet communication method for storing packets arriving before communication restart, transmitting the packets stored after communication restart, and immediately processing the received packets only by the receiving terminal.
続され、各無線基地局を中心にそれぞれ形成される無線
セル内に位置する移動端末が、無線基地局およびパケッ
ト制御局を介して移動端末または固定端末とパケット通
信を行うパケット通信方法において、 無線基地局は、到着したパケットを遅延時間τの経過後
に受信側の端末に送信し、 前記移動端末の無線セル間の移動によるハンドオーバ時
に、移動先の無線基地局は通信再開後に到着したパケッ
トに限って即時に受信側の端末に送信することを特徴と
するパケット通信方法。3. A plurality of radio base stations are connected to a packet control station, and a mobile terminal located in a radio cell formed around each radio base station moves via the radio base station and the packet control station. In a packet communication method for performing packet communication with a terminal or a fixed terminal, the radio base station transmits an arriving packet to a receiving terminal after a delay time τ has elapsed, and at the time of handover due to movement of the mobile terminal between radio cells, A packet communication method in which a destination wireless base station immediately transmits only packets arriving after communication restart to a receiving terminal.
信方法において、 パケットを中継する端末は、到着したパケットを遅延時
間τの経過後に受信側の端末に送信し、 中継する端末を変更する時に、変更先の中継端末は通信
再開後に到着したパケットに限って即時に受信側の端末
に送信することを特徴とするパケット通信方法。4. A packet communication method for performing packet communication between terminals, wherein a terminal that relays a packet transmits an arrived packet to a terminal on the receiving side after a lapse of a delay time τ. A packet communication method in which a relay terminal of a change destination immediately transmits only packets arriving after communication restart to a terminal on a receiving side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11556597A JP3442257B2 (en) | 1997-05-06 | 1997-05-06 | Packet communication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11556597A JP3442257B2 (en) | 1997-05-06 | 1997-05-06 | Packet communication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10308775A true JPH10308775A (en) | 1998-11-17 |
| JP3442257B2 JP3442257B2 (en) | 2003-09-02 |
Family
ID=14665707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11556597A Expired - Lifetime JP3442257B2 (en) | 1997-05-06 | 1997-05-06 | Packet communication method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3442257B2 (en) |
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| KR100469706B1 (en) * | 2001-03-06 | 2005-02-02 | 삼성전자주식회사 | Packet service apparatus and method in mobile communication system |
| KR100582731B1 (en) | 2005-03-03 | 2006-05-22 | 삼성전자주식회사 | Method for exchanging message of mobile node in mobile ipv6 network |
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