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Ordering long transport channels and short transport channels

A technology for transmitting information, channels, applied in transmission systems, digital transmission systems, error prevention/detection using return channels, etc., and can solve problems such as insufficient time

Inactive Publication Date: 2009-05-20
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the scheduler does not know the contents of the ARQ Status Ack message sent in the ULCH when this frame was generated, the amount of time required by the AP to decode the PDUs in the ULCH, update the ARQ table, and generate and retransmit the ARQ message if needed may not be sufficient

Method used

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  • Ordering long transport channels and short transport channels
  • Ordering long transport channels and short transport channels
  • Ordering long transport channels and short transport channels

Examples

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Embodiment Construction

[0033] In the following description, for purposes of explanation and not limitation, specific details such as specific frame protocols, frame structures, techniques, etc. are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, and frame structures are omitted so as not to obscure the description of the present invention.

[0034] According to a preferred embodiment of the present invention, the DLCH is before the ULCH in this MAC frame structure, as shown in FIG. 5 . According to this preferred embodiment, the scheduler generally sends the corresponding DL LCH PDU in the ULCH d rx，MT ARQ feedback space (ie, one or more slots) is allocated in a frame. Likewise, the scheduler sends the corresponding UL LCH PDU on DLC...

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Abstract

In a wireless local area network (LAN) such as compliant with the HIPERLAN 2 standard, the scheduling of long channel (LCH) PDUs and short channel (SCH) PDUs is based on knowledge of the required ARQ response time. Thus, mobile terminals communicating with access points, especially over time-critical connections, are given a maximum amount of time to generate ARQ messages while still obtaining fast response times. For example, in cases where there is a greater likelihood that an uplink channel (ULCH) will precede a downlink channel (DLCH) in a medium access control (MAC) data frame, by scheduling the SCHs associated with a given connection so that these SCHs following corresponding LCHs in the ULCH of a MAC frame may maximize the amount of time required to generate an ARQ message, and wherein these SCHs precede corresponding LCHs in the DLCH of the MAC frame.

Description

technical field [0001] The present invention relates to the field of wireless local area network (LAN) communications, and more particularly to the use of automatic repeat request (ARQ) to communicate protocol data unit (PDU) reception status information between sending and receiving entities in the LAN and when retransmission is required When the PDU is retransmitted. Background technique [0002] The new standard for wireless LAN services is called ETSI HIPERLAN Type 2. The high throughput capabilities associated with HIPERLAN Type 2 are expected to bring new opportunities for existing and new applications. [0003] HIPERLAN Type 2 uses a Time Division Duplex (TDD) scheme in which an Access Point (AP) and a Mobile Terminal (MT) communicate with each other using different time slots on the same frequency channel. [0004] Figure 1 represents part of a typical HIPERLAN Type2 system, where APs are connected to the operator's intranet. However, these MTs can be used as wire...

Claims

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Application Information

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IPC IPC(8): H04L12/28H04L1/18H04L1/00
CPCH04L12/28H04L1/18H04L1/00H04L12/12H04L1/0017H04L1/1861H04L5/0055H04L5/0092
Inventor J·林德斯科J·奥尔松G·马姆格伦G·米克洛斯
Owner TELEFON AB LM ERICSSON (PUBL)
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