IETF Logo Mail Archive

Re: [rtcweb] JSEP and ice-pacing attribute

Christer Holmberg <christer.holmberg@ericsson.com> Wed, 31 July 2019 06:05 UTC

Return-Path: <christer.holmberg@ericsson.com>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 20F91120025 for <rtcweb@ietfa.amsl.com>; Tue, 30 Jul 2019 23:05:23 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.001
X-Spam-Level:
X-Spam-Status: No, score=-2.001 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=ericsson.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id viCaxqmYyyCZ for <rtcweb@ietfa.amsl.com>; Tue, 30 Jul 2019 23:05:20 -0700 (PDT)
Received: from EUR03-DB5-obe.outbound.protection.outlook.com (mail-eopbgr40077.outbound.protection.outlook.com [40.107.4.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 87955120019 for <rtcweb@ietf.org>; Tue, 30 Jul 2019 23:05:19 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Nmeh9k063YUotZpGoh8V34h2pLsz29xLO5OXwENqMYSXsRhDO2LOIUhDKXN8rwzIaELN/yg8oIxyjDNtKH4UKfKCKMl6UDc6c8qSWCpex4CcA/ukAQNiWDBtv1/VR0nCO6C6qV7OlkphxwC/2oBpL6eNK5FQJ4vThzpLqJUuE2Jb2onRGd461Pjc5YdBnHNmaHH1V4fRdmDMBj6m+4pIj0B7/LqoUcECCW0eAFoRht7Iq5vt6l4va9SLTOYjWDuOSkOK//FSZUTbEpzCTZv+dQUhMtq0yOELS5p79NDbeFE+Wi9MKv9vGgBLj0WkvyW73C5TBDi1NnOq9qkeKxLyQw==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=4zcrV320ladOzX2jX4x2fTfnWBw1LMIbrlD2mt6M0pI=; b=oUZzvyeXYTT7w66smrWIDFhi8gNi/E6mdDDNGfIGD98ZVzkHTmfvq+J1n6DtP0OkuxzgIkeimSL2kfNza8JSYjIGKCxIrA767kCtbwpjPsqy8UXOuO6KygjuKKSCCie8sqUl7329bkUO7irg6qRZ7NErwJGEoEfrjPxnTrZiVUbl1xXu0lad2HR2IdCVNpbK84/0XvF6lsTGYIGHvVvbMdXyMj7IAlEQH6LT/jnRIKFMHQI4CFimnSzwQOqQT9URYHgan7WIsmtqKfdXM9n6jfkC/1ipX3I4IUozNwS2i0Hl2oHlrhWFjHb96JvDFH3mg8/DZd0+rwJkD6pj5kD0cw==
ARC-Authentication-Results: i=1; mx.microsoft.com 1;spf=pass smtp.mailfrom=ericsson.com;dmarc=pass action=none header.from=ericsson.com;dkim=pass header.d=ericsson.com;arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ericsson.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=4zcrV320ladOzX2jX4x2fTfnWBw1LMIbrlD2mt6M0pI=; b=fq0+ffUsgYSh1BKG5gIvGuuwRr4yrqbB8JIRq8306BqrL6Nr0NC1G67nw7ZCQRK+1SOuMTpDXO9bjdVQNQvNSue3i1qTy/m4s7Wtnir+kQVspIbF5+XV9iMax0pGOsORyGlwGQTw1mut+SKawpGvgx2Tfi/Hj6issZKiKByjQe0=
Received: from HE1PR07MB3161.eurprd07.prod.outlook.com (10.170.245.23) by HE1PR07MB3449.eurprd07.prod.outlook.com (10.170.247.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2136.10; Wed, 31 Jul 2019 06:05:13 +0000
Received: from HE1PR07MB3161.eurprd07.prod.outlook.com ([fe80::ec0d:f9d3:7159:ba7]) by HE1PR07MB3161.eurprd07.prod.outlook.com ([fe80::ec0d:f9d3:7159:ba7%6]) with mapi id 15.20.2136.010; Wed, 31 Jul 2019 06:05:13 +0000
From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Justin Uberti <juberti=40google.com@dmarc.ietf.org>, Harald Alvestrand <harald@alvestrand.no>
CC: RTCWeb IETF <rtcweb@ietf.org>
Thread-Topic: [rtcweb] JSEP and ice-pacing attribute
Thread-Index: AdVHEpE+giMmYQ8tTyuReNcouqrB6AADvgIAAA38moAAAwR/IA==
Date: Wed, 31 Jul 2019 06:05:13 +0000
Message-ID: <HE1PR07MB31615F00C56CD5C15F6AFFA693DF0@HE1PR07MB3161.eurprd07.prod.outlook.com>
References: <HE1PR07MB3161E5882EE23A304E86111E93DC0@HE1PR07MB3161.eurprd07.prod.outlook.com> <5dc4a383-93ce-8313-3b1c-434fb0a97876@alvestrand.no> <CAOJ7v-3p9rc-qp1uy2qW5XxCtB8LDcGSdP4CHceX2NgRFb9YhA@mail.gmail.com>
In-Reply-To: <CAOJ7v-3p9rc-qp1uy2qW5XxCtB8LDcGSdP4CHceX2NgRFb9YhA@mail.gmail.com>
Accept-Language: en-US
Content-Language: fi-FI
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: spf=none (sender IP is ) smtp.mailfrom=christer.holmberg@ericsson.com;
x-originating-ip: [79.134.118.162]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 875ad7e8-1d7f-4a29-ce3b-08d7157d0d23
x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:HE1PR07MB3449;
x-ms-traffictypediagnostic: HE1PR07MB3449:
x-ms-exchange-purlcount: 1
x-microsoft-antispam-prvs: <HE1PR07MB34491808091283276A9A88A993DF0@HE1PR07MB3449.eurprd07.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:10000;
x-forefront-prvs: 011579F31F
x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(4636009)(346002)(376002)(39860400002)(396003)(366004)(136003)(199004)(189003)(51444003)(53546011)(64756008)(3846002)(316002)(7736002)(6116002)(2906002)(14454004)(486006)(478600001)(14444005)(44832011)(33656002)(52536014)(11346002)(446003)(66556008)(81166006)(81156014)(790700001)(966005)(76116006)(66446008)(476003)(8936002)(66946007)(66476007)(86362001)(25786009)(110136005)(6506007)(9686003)(8676002)(606006)(9326002)(256004)(68736007)(74316002)(26005)(5660300002)(7696005)(102836004)(236005)(71200400001)(54896002)(66066001)(53936002)(6306002)(71190400001)(6436002)(186003)(76176011)(99286004)(55016002)(4326008); DIR:OUT; SFP:1101; SCL:1; SRVR:HE1PR07MB3449; H:HE1PR07MB3161.eurprd07.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1;
received-spf: None (protection.outlook.com: ericsson.com does not designate permitted sender hosts)
x-ms-exchange-senderadcheck: 1
x-microsoft-antispam-message-info: 2q8NQygtZvZ/6H8iX1hsXlS5DbPDHrSmsRdmEuaklMufGK34DRkc8QDJjLIM4rtTwQTF1CLVNjoM2SESjnpyIuAwhvF5tSgUrBdWVGF9atkRMlqZ8K5d4jhxhO85ttHUDfiOZe3zskGpf6O0H7QM2woC50TFV5rPLUUTaa5poztIKefGnl8CBdbFnHCE7YMidBFg/5/FtEkWfsDztVYPi4+1OYhGuzMtjK6u6PNd37WFxHvOJlXkLt0Kaf8M7iKbnXSK6kkFv1sgZWxvPaYkSbInV0Uz+3MWLI2nXjjcK7n0xkmoEN8CPORk/Ev+pXDqw656TlgK1O+Ngcge4ep6GJmjUBRJgnYx3aOYsj8XoJcuoCM7W4zI6Df1XZcjZLGDp+xA/qsKd6pOsR0rBJb3BvGgeqX1s3wN3LCF9TVk5Dk=
Content-Type: multipart/alternative; boundary="_000_HE1PR07MB31615F00C56CD5C15F6AFFA693DF0HE1PR07MB3161eurp_"
MIME-Version: 1.0
X-OriginatorOrg: ericsson.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 875ad7e8-1d7f-4a29-ce3b-08d7157d0d23
X-MS-Exchange-CrossTenant-originalarrivaltime: 31 Jul 2019 06:05:13.0880 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 92e84ceb-fbfd-47ab-be52-080c6b87953f
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: christer.holmberg@ericsson.com
X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR07MB3449
Archived-At: <https://mailarchive.ietf.org/arch/msg/rtcweb/3s_krrFo7FDPVwCxeBC4yAweWJg>
Subject: Re: [rtcweb] JSEP and ice-pacing attribute
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Real-Time Communication in WEB-browsers working group list <rtcweb.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/rtcweb/>
List-Post: <mailto:rtcweb@ietf.org>
List-Help: <mailto:rtcweb-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 31 Jul 2019 06:05:23 -0000

Hi,

>Right, I don't think JSEP has much to say on the matter here - the pacing isn't exposed as an API to the >application, so default values (or ones close to the defaults) will typically be used.

If something is NOT used/exposed, I think that would have been good to indicate.

But, I realize it’s late in the process, so I’ll leave it at there. Just wanted to clarify.

Regards,

Christer


On Tue, Jul 30, 2019 at 2:56 PM Harald Alvestrand <harald@alvestrand.no<mailto:harald@alvestrand.no>> wrote:
Den 30.07.2019 22:08, skrev Christer Holmberg:
> Hi,
>
>
>
> I noted that JSEP does not specify the usage of the ice-pacing
> attribute. Is there a reason for that? It does explicitly specify how
> all the other ICE related SDP attributes are used.

I think we overlooked it.

"ice-pacing" was introduced in draft-ietf-mmusic-ice-sip-sdp-03 (July
2014), so we can't claim it's because it's too new..... JSEP was only at
its version -07 at that time.

According to RFC 8445 section 14.2, this attribute sets the value of the
Ta timer (or at least this is the only interpretation that I can see
that makes sense).

According to draft-ietf-mmusic-ice-sip-sdp-36, "ice-pacing" only allows
increasing the value of Ta to a value larger than its default (50 ms)
(while 8445 seems to indicate that a single agent can go all the way
down to 5 ms, but not lower).

I'm happy to interpret jsep's silence on the matter as "does not define
additional rules for ice-pacing", and leave it on the list of issues to
consider when JSEP is revised.


>
>
>
> Regards,
>
>
>
> Christer
>
>
> _______________________________________________
> rtcweb mailing list
> rtcweb@ietf.org<mailto:rtcweb@ietf.org>
> https://www.ietf.org/mailman/listinfo/rtcweb
>

_______________________________________________
rtcweb mailing list
rtcweb@ietf.org<mailto:rtcweb@ietf.org>
https://www.ietf.org/mailman/listinfo/rtcweb

v2.23.0 | Report a Bug | By Email